修改bluez-5.37中./profiles/audio/avrcp.c
去掉改支持AVRCP_EVENT_VOLUME_CHANGED
3816 session->supported_events |=
3817 (1 << AVRCP_EVENT_ADDRESSED_PLAYER_CHANGED) |
3818 (1 << AVRCP_EVENT_AVAILABLE_PLAYERS_CHANGED);
3819 //(1 << AVRCP_EVENT_VOLUME_CHANGED);