Indicate that the volume was changed.
#include <bps/mediacontroller.h>
BPS_API int mediacontroller_volume_update(void)
BlackBerry 10.0.0
The mediacontroller_volume_update() function informs the Now Playing service that the volume was changed and that a volume toast should be displayed.
BPS_SUCCESS when the function completes successfully, BPS_FAILURE with errno value set otherwise.