Refine getPackageInfo for Apex match policy

The legacy match policy could confuse, for example,
the naming of MATCH_APEX do not named with "ONLY|FACTORY|ACTIVE",
it's make sense to joint both active and factory apexes.

Policy refined:
1. MATCH_FACTORY_ONLY : Return *factory* [eg. the version on the system image] APK packages only
2. MATCH_APEX : Return *active* APK or APEX packages
3. MATCH_FACTORY_ONLY | MATCH_APEX : Return *factory* APK or APEX packages
4. NONE (0) : Return *active* APK packages only

Fixes: 142365486
Bug: 142115351
Test: adb shell pm path $APEX_PKG_NAME
Test: adb shell pm path $APK_PKG_NAME
Test: adb shell pm list packages --apex-only
Test: atest ApexManagerTest
Test: atest CtsStagedInstallHostTestCases

Change-Id: Ifa01278201dd23672dfc1a30f67b888df9bc1bfd