Multi-user aware TSMS

Currently, spell checker component can process requests only from the
foreground user's account and requests from background users are always
ignored. However, in order to fully realize the multi-user nature of
Android, most system services will need to truly support multiple users
simultaneously. With multi-user aware TSMS implemented, apps from
background users (other accounts and their work profiles) can also run
their spell checking jobs in batch, without the external device user
having to switch accounts for the spell checker to be enabled in that
account.

Bug: 63041121
Test: Manually as follows
Setup: Create a work profile and a secondary user
1. adb shell pm create-user --profileOf 0 --managed workprofile (userId 10)
2. adb shell am create-user seconrdaryuser1 (userId 11)
3. Build SampleSpellCheckerService, which is by default
    direct-boot unaware.
     package name: com.example.android.samplespellcheckerservice
     APK name: SampleSpellCheckerService_DBUnaware.apk
4. Also build a custom SampleSpellCheckerService by explicitly
     making '.SampleSpellCheckerService' direct-boot aware.
     package name: com.example.android.samplespellcheckerservice2
     APK name: SampleSpellCheckerService_DBAware.apk
5. adb install --user 0 -r SampleSpellCheckerService_DBUnaware.apk
6. adb install --user 10 -r SampleSpellCheckerService_DBUnaware.apk
7. adb install --user 11 -r SampleSpellCheckerService_DBUnaware.apk
8. adb install --user 0 -r SampleSpellCheckerService_DBAware.apk
9. adb install --user 10 -r SampleSpellCheckerService_DBAware.apk
10. adb install --user 11 -r SampleSpellCheckerService_DBAware.apk
11. make -j ApiDemos
12. adb install --user 0 -r $ANDROID_PRODUCT_OUT/data/app/ApiDemos/ApiDemos.apk
13. adb install --user 10 -r $ANDROID_PRODUCT_OUT/data/app/ApiDemos/ApiDemos.apk
14. adb install --user 11 -r $ANDROID_PRODUCT_OUT/data/app/ApiDemos/ApiDemos.apk
15. Make sure AOSP Keyboard (com.android.inputmethod.latin) is installed
for all users.

Test 1: Settings correctly updated for each user (Work profile's SC is
not bound to account and can be individually updated)
0. Complete Setup
1. adb shell am start-user 0
2. adb shell am start-user 10
3. adb shell am start-user 11
4. adb shell settings put --user 0 secure selected_spell_checker com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
5. adb shell settings put --user 10 secure selected_spell_checker com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
6. adb shell settings put --user 11 secure selected_spell_checker com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
7. adb shell settings get --user 0 secure selected_spell_checker
         -> com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
8. adb shell settings get --user 10 secure selected_spell_checker
         -> com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
9. adb shell settings get --user 11 secure selected_spell_checker
         -> com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
10. adb shell settings put --user 0 secure selected_spell_checker com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
11. adb shell settings get --user 0 secure selected_spell_checker
         -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
12. Repeat 8 & 9. Results should be the same.
13. adb shell settings put --user 10 secure selected_spell_checker com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
14. adb shell settings get --user 10 secure selected_spell_checker
         -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
15. adb shell settings get --user 0 secure selected_spell_checker
         -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
16. adb shell settings get --user 11 secure selected_spell_checker
         -> com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
17. adb shell settings put --user 11 secure selected_spell_checker com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
14. adb shell settings get --user 11 secure selected_spell_checker
         -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
14. adb shell settings get --user 0 secure selected_spell_checker
         -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
15. adb shell settings get --user 10 secure selected_spell_checker
         -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
16. adb shell am start-user 0
17. adb shell am start-user 10
18. adb shell am start-user 11
19. adb shell settings put --user 0 secure selected_spell_checker com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
20. adb shell settings put --user 10 secure selected_spell_checker com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
21. adb shell settings put --user 11 secure selected_spell_checker com.example.android.samplespellcheckerservice/.SampleSpellCheckerService

Test 2: Basic functionality works (each user can use SC when they're at
the foreground) & background connections aren't broken
0. Complete Setup
1. Open "Api Demos" app for user 0
2. Go to Views/Text/EditText
3. Focus into the first EditText then type "aaa"
4. Focus into the second EditText then type "aaa"
5. adb shell dumpsys textservices --user 0
         -> make sure 'com.example.android.samplespellcheckerservice'
            is serving spell checker sessions.
6. adb shell dumpsys textservices --user 10
         -> make sure there are no active spell checker sessions.
7. adb shell dumpsys textservices --user 10
         -> make sure there are no active spell checker sessions.
8. Repeat 7-10 for the work profile (userId 10)
9. adb shell dumpsys textservices --user 10
         -> make sure 'com.example.android.samplespellcheckerservice'
            is serving spell checker sessions.
10. adb shell am switch-user 11
11. Repeat 7-10 (userId 11)
12. adb shell dumpsys textservices --user 11
         -> make sure 'com.example.android.samplespellcheckerservice'
            is serving spell checker sessions.
13. adb shell dumpsys textservices --user 0
         -> make sure 'com.example.android.samplespellcheckerservice'
            is serving spell checker sessions.
14. adb shell dumpsys textservices --user 10
         -> make sure 'com.example.android.samplespellcheckerservice'
            is serving spell checker sessions.

Test 3: Background user can also call spell checker APIs
0. Complete Setup
1. adb shell pm install -r TestApp.apk
2. adb shell am switch-user 11
3. adb shell am start --user 11 -n com.example.gulizseray.testapp/com.example.gulizseray.testapp.MainActivity
4. adb logcat | grep spellcheckerclient
        -> Periodically calls spell checker APIs and prints results
5. adb shell dumpsys textservices --user 11
         -> make sure 'com.example.android.samplespellcheckerservice'
            is serving spell checker sessions.
6. Adb shell am switch-user 0
7. adb logcat | grep spellcheckerclient
        -> Continues to periodically call SC APIs and print results
8. Open "Api Demos" app for user 0
9. Go to Views/Text/EditText
10. Focus into the first EditText then type "aaa"
11. Focus into the second EditText then type "aaa"
12. adb shell dumpsys textservices --user 0
         -> make sure 'com.example.android.samplespellcheckerservice'
            is serving spell checker sessions.
13. adb shell dumpsys textservices --user 11
         -> make sure 'com.example.android.samplespellcheckerservice'
            is serving spell checker sessions.

Test 4: Package updates for all unlocked users (not just foreground user) are tracked properly (New package added/removed from owner, profile, secondary users)
0. Complete Setup
1. adb uninstall --user 0 com.example.android.samplespellcheckerservice
2. adb shell dumpsys textservices --user 0
        -> Make sure com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
        does not exist in the list
3. adb shell settings get --user 0 secure selected_spell_checker
       -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
4. adb uninstall --user 10 com.example.android.samplespellcheckerservice
5. adb shell dumpsys textservices --user 10
        -> Make sure com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
        does not exist in the list
6. adb shell settings get --user 10 secure selected_spell_checker
       -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
7. adb uninstall --user 11 com.example.android.samplespellcheckerservice
8. adb shell dumpsys textservices --user 11
        -> Make sure com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
        does not exist in the list
9. adb shell settings get --user 11 secure selected_spell_checker
       -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
10. adb install --user 0 -r out/target/product/generic/system/app/SampleSpellCheckerService/SampleSpellCheckerService.apk
11. adb shell dumpsys textservices --user 0
       -> Make sure com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
       is in the list

12. adb shell settings get --user 0 secure selected_spell_checker
       -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
13. adb install --user 10 -r out/target/product/generic/system/app/SampleSpellCheckerService/SampleSpellCheckerService.apk
14. adb shell dumpsys textservices --user 10
       -> Make sure com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
       is in the list
15. adb shell settings get --user 10 secure selected_spell_checker
       -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService
16. adb install --user 11 -r out/target/product/generic/system/app/SampleSpellCheckerService/SampleSpellCheckerService.apk
17. adb shell dumpsys textservices --user 11
       -> Make sure com.example.android.samplespellcheckerservice/.SampleSpellCheckerService
       is in the list
18. adb shell settings get --user 11 secure selected_spell_checker
       -> com.android.inputmethod.latin/.spellcheck.AndroidSpellCheckerService

Test 5: SpellCheckerBindGroups will be cleared when the corresponding
app is killed.
0. Complete Setup
1. Open "Api Demos" app for user 0
2. Go to Views/Text/EditText
3. Focus into the first EditText then type "aaa"
4. Focus into the second EditText then type "aaa"
5. adb shell dumpsys textservices --user 0
         -> make sure 'com.example.android.samplespellcheckerservice'
            is serving spell checker sessions.
6. Kill Api Demos
7. adb shell dumpsys textservices --user 0
         -> make sure there are no active spell checker sessions.
8. Repeat 1-7 for work profile (user 10)
9. adb shell am switch-user 11
10. Repeat 1-7 for secondary user (user 11)
12. adb shell pm install -r TestApp.apk
13. adb shell am start --user 11 -n com.example.gulizseray.testapp/com.example.gulizseray.testapp.MainActivity
14. adb shell dumpsys textservices --user 11
         -> make sure 'com.example.android.samplespellcheckerservice'
            is serving spell checker sessions.
15. adb shell am switch-user 0
16. adb shell am force-stop com.example.gulizseray.testapp
17. adb shell dumpsys textservices --user 11
         -> make sure there are no active spell checker sessions.
Change-Id: I06c27ef834203a21cc445dc126602c799384527b