[Privileged]Set the use of the headphone output volume boost.
#include <audio/audio_manager_volume.h>
int audio_manager_set_headphone_volume_boost(bool enable)
True, if the extra volume boost is allowed; false, otherwise.
The audio_manager_set_headphone_volume_boost() function sets the enable status of the headphone output level to allow an extra volume boost to the headphone output.
EOK upon success, negative errno upon failure.