Adjust the audio input level of a given audio device.
#include <audio/audio_manager_volume.h>
int audio_manager_adjust_input_level(audio_manager_device_t dev, double level)
The audio device the new input level is applied to.
The change in level of the audio input in percentage (e.g. 10.00 = 10% increase, -10.00 = 10% decrease).
The audio_manager_adjust_input_level() function adjusts the audio input level of a given audio device.
EOK upon success, negative errno upon failure.