Tie FAS service-start to the same idleness state as O+ bg restrictions

Change-Id: I5b80519f7006fcee63644235d91435f0a591ea50
Fixes: 78322423
Test: ApiDemos outside FAS with startService() in Activity#onStop()
Test: ApiDemos in FAS service exercises (checking regressions)
Test: Maps navigation (checking regressions)
2 files changed