Merge "Verify BluetoothDevice is not null before calling BluetoothHearingAid...
Merge "Verify BluetoothDevice is not null before calling BluetoothHearingAid System APIs" into rvc-dev am: 32ec718c am: f07ee55a am: 290f90bf
Change-Id: I56742e79a1ecd7587c557907825defce6b26628e