02153e697d
Allow muting BT SCO volume only from explicit mute request and not when stream volume index is set to 0. This is to match BT requirement that the valid SCO volume range is 0 to 15 and let the headset deal with actual attenuation for index 0. If explicitly muted via adjustStreamVolume() from an app with permission MODIFY_PHONE_STATE, then we set the audio policy stream volume to 0 and effectively mute RX path. Also change default value of Settings.System.MUTE_STREAMS_AFFECTED to include AudioManager.STREAM_BLUETOOTH_SCO. Bug: 111195322 Test: test volume changes in call over BT SCO Change-Id: I3b6560bbd1bcbb01a29aa746f23bae74329a1fa7