Load PermissionGroups completely async

Before we relied on 'manual' referesh calls in onResume, etc... . Now
all the updating is done triggered by a loader based on
PermissionsChangeListener in PermissionGroups.PermissionsLoader.

Fixes: 33354617
Test: - Revoked permission in manage permission UI. Global manage
permission UI got updated.
- Granted permission inside of app while settings was open. Saw
  settings to get updated.

Change-Id: I3f35564885b6020d1729d61fc9056d732a0366c1