Merge "AudioPolicy: enable phone apps to mute VOICE_CALL stream"

                                                  audio_devices_t device)

{

    if ((index < mVolumeCurves->getVolumeIndexMin(stream)) ||

    // VOICE_CALL stream has minVolumeIndex > 0  but can be muted directly by an

    // app that has MODIFY_PHONE_STATE permission.

    if (((index < mVolumeCurves->getVolumeIndexMin(stream)) &&

            !(stream == AUDIO_STREAM_VOICE_CALL && index == 0)) ||

            (index > mVolumeCurves->getVolumeIndexMax(stream))) {

        return BAD_VALUE;

    }