Reset mute state when entering QuiescentBluetoothState.

Currently we skipped the mute state reset when entering the
QuiescentBluetoothState. This will cause the call route to BT devices
hold it's mute state even in the following calls.

Bug: b/311313250
Test: atest CallAudioRouteStateMachineTest
Change-Id: I3561cd884706b63266c23af81e8c1e73c1b89bdf
3 files changed