broadcast_audio_scan_service_server_register_packet_handler() function
Register packet handler to receive events: - GATTSERVICE_SUBEVENT_BASS_SERVER_SCAN_STOPPED - GATTSERVICE_SUBEVENT_BASS_SERVER_SCAN_STARTED - GATTSERVICE_SUBEVENT_BASS_SERVER_BROADCAST_CODE - GATTSERVICE_SUBEVENT_BASS_SERVER_SOURCE_ADDED - GATTSERVICE_SUBEVENT_BASS_SERVER_SOURCE_MODIFIED - GATTSERVICE_SUBEVENT_BASS_SERVER_SOURCE_DELETED