fix(aaudio): Wait for AAudioStream status change

[osoftware]

This PR fixes two bugs at once.

After starting the stream and before the status changes to Started, dropping it causes the main thread to lock permanently. The underlying AAudioStream never closes while the drop method waits for it to close. By using wait_for_state_change method we ensure the play method won't return befor it's safe to drop the stream.

If wait_for_state_change is never called then AAudioStream_getTimestamp always returns InvalidState error leading to info.timestamp().capture and info.timestamp().playback in stream callbacks always returning zero.