Use setTextOperationUser() in KeyguardPasswordView and RemoteInputView

Android implements many complex text-related operations as per-user
out-of-process services. Notable examples are:

  * InputMethodServices
  * SpellCheckerService
  * TextClassifierService
  * AutofillService

For service client processes to connect to the right user's services
often the system assumes that a process that runs as user X should
connect to services that run as user X.  While this approach works for
most of cases, there is at least one exception, System UI, which
always runs as the primary user (unless the device enables special
mode e.g. UserManager.isSplitSystemUser()) no matter who is the
current foreground user.

In order to deal with this special case, we recently introduced an
@hide API TextView#setTextOperationUser() [1] to centralize cross-user
special logic inside TextView.  With this CL, KeyguardPasswordView and
RemoteInputView actually start calling it.

Note that TextView#setTextOperationUser() already takes care of IMEs
and SpellCheckers hence those two operations start working as expected
with this CL.  Once TextView#setTextOperationUser() start taking care
of other operations such as text classification and clipboard,
KeyguardPasswordView and RemoteInputView will be automatically taken
care of with no code change.

 [1]: I6d11e4d6a84570bc2991a8552349e8b216b0d139
      401e3d4c

Fix: 120744418
Fix: 123043618
Test: atest SystemUITests
Test: Manually tested Bug 120744418 scenario as follows.
  1. Build and flash an AOSP build
  2. adb root
  3. adb shell setprop persist.debug.per_profile_ime 1
  4. adb reboot
  5. Install Test DPC
  6. Enable managed profile with Test DPC
  7. make -j SoftKeyboard
  8. adb install -r $OUT/system/app/SoftKeyboard/SoftKeyboard.apk
  9. adb shell ime enable com.example.android.softkeyboard/.SoftKeyboard
 10. adb shell ime set com.example.android.softkeyboard/.SoftKeyboard
 11. make -j EditTextVariations
 12. adb install -r $ANDROID_TARGET_OUT_TESTCASES/EditTextVariations/EditTextVariations.apk
 13. adb shell am start --user 0 \
     -n com.android.inputmethod.tools.edittextvariations/.EditTextVariations
 14. Tap the menu icon on the EditTextVariations then click "Direct Reply"
 15. adb shell am start --user 10 \
     -n com.android.inputmethod.tools.edittextvariations/.EditTextVariations
 16. Tap the menu icon on the EditTextVariations then click "Direct Reply"
 17. Open notification shade.
 18. Tap reply icon on "Message from UserHandle{0}".
 19. Make sure that SoftKeyboard Sample IME is shown.
 20. Tap reply icon on "Message from UserHandle{10}".
 21. Make sure that AOSP Keyboard is shown.
 22. Tap reply icon on "Message from UserHandle{0}" again.
 23. Make sure that SoftKeyboard Sample IME is shown again.
Test: Manually tested Bug 123043618 scenario as follows.
  1. Build and flash an AOSP build
  2. Create a secondary user then switch to it.
  3. make -j SoftKeyboard
  4. adb install -r $OUT/system/app/SoftKeyboard/SoftKeyboard.apk
  5. adb shell ime enable com.example.android.softkeyboard/.SoftKeyboard
  6. adb shell ime set com.example.android.softkeyboard/.SoftKeyboard
  7. make -j EditTextVariations
  8. adb install -r $ANDROID_TARGET_OUT_TESTCASES/EditTextVariations/EditTextVariations.apk
  9. adb shell am start \
     -n com.android.inputmethod.tools.edittextvariations/.EditTextVariations
 10. Tap the menu icon on the EditTextVariations then click "Direct Reply"
 11. Tap reply icon on "Message from UserHandle{10}".
 12. Make sure that SoftKeyboard Sample IME is shown.
 13. Type "ggggg" then hit the space key.
 14. Make sure that red underline is drawn under "ggggg"
 15. Make sure that AndroidSpellCheckerService runs as user 10.
Test: Manually tested multi-user scenario with per-profile mode as follows.
  1. Build and flash an AOSP build
  2. adb root
  3. adb shell setprop persist.debug.per_profile_ime 1
  4. adb reboot
  5. Create a secondary user then switch to it.
  6. make -j SoftKeyboard
  7. adb install -r $OUT/system/app/SoftKeyboard/SoftKeyboard.apk
  8. adb shell ime enable com.example.android.softkeyboard/.SoftKeyboard
  9. adb shell ime set com.example.android.softkeyboard/.SoftKeyboard
 10. make -j EditTextVariations
 11. adb install -r $ANDROID_TARGET_OUT_TESTCASES/EditTextVariations/EditTextVariations.apk
 12. adb shell am start \
     -n com.android.inputmethod.tools.edittextvariations/.EditTextVariations
 13. Tap the menu icon on the EditTextVariations then click "Direct Reply"
 14. Tap reply icon on "Message from UserHandle{10}".
 15. Make sure that SoftKeyboard Sample IME is shown.
 16. Type "ggggg" then hit the space key.
 17. Make sure that red underline is drawn under "ggggg"
 18. Make sure that AndroidSpellCheckerService runs as user 10.
 19. Set up a text screenlock.
 20. Turn off the display.
 21. Turn on the display.
 22. Make sure that SoftKeyboard Sample IME is shown.
Change-Id: Ibabe13e5b85e5bb91f9f8af6ec07c395c25c4393