Make sure mRecognitionRequested is reset when a failure
condition disables all recognitions: A stale value would
prevent from registering call and power state listeners
and properly update the states.
Also:
- In isRecognitionAllowed(), read current call and power
states directly from services if listeners are not registered.
- Also add missing null checks on mModule at various places.
Bug: 139268184
Test: repro steps in the bug
Change-Id: I763130b4d491a1a6a9e0756c7a18943e406ce73e
2fedc55920