Mute the audio output of the modem.
#include <audio/audio_manager_volume.h>
int audio_manager_set_modem_output_mute(bool mute)
true if the output of the modem should be muted, false otherwise.
The audio_manager_set_modem_output_mute() function mutes the audio output of the modem.
A process must have either an effective user ID of root, or the authman capability of access_audio_manager, to use this function.
Note that this function is intended for use by system components. Therefore, it is not suitable for all applications.
EOK upon success, negative errno upon failure.