Refactor PermissionsActivity and add PermissionsProjectedActivity

- Created phone PermissionsActivity with live grant status.
- Added PermissionsProjectedActivity for projected permission requests.
- Upgraded PermissionsProjectedActivity UI to high contrast.
- Scoped projected activity lifecycle to terminate when phone activity
  finishes.

Test: ./gradlew :xr:projected:integration-tests:testapp:lintDebug
Test: ./gradlew :xr:projected:integration-tests:testapp:assembleDebug
Relnote: N/A
Change-Id: I7c86ad5222ab4a7b47c3143a55575bec9087904b