In order to gracefully stop the I2S stream, add an interface to set a `streaming` status variable that sets the `AUDIO_APB_FINAL` flag that will be handled by the upper layers of the audio subsystem.
In order to gracefully stop the I2S stream, add an interface to set a `streaming` status variable that sets the `AUDIO_APB_FINAL` flag that will be handled by the upper layers of the audio subsystem.