ServiceStateTracker notifies via ContentProvider

ServiceStateTracker inserts updated ServiceStates into the provider.
Telephony.ServiceStateTable contains helper functions and constants for
interfacing with the ServiceStateProvider.

Also update ContextFixture so the unit tests doesn't fail when trying to
use the service-state authority

Bug: 33756364
Test: runtest --path ServiceStateTrackerTest
Change-Id: I6b07b54f803765bba4c014474926a825113ac952
Merged-In: I6b07b54f803765bba4c014474926a825113ac952