Switch Android to mono when only one airpod is in an ear

[djuniah]

The in ear detection seems to work great, I can see it being recognized in the notification. It would be great if that actually did something though. I realize we can't get the same level of functionality that iOS has there, but there might be something else that could be done. Under the audio section of the accessibility settings on Android, there's an option for mono audio. It would be great if openpods could toggle that on when only one airpod is in, and toggle it off when either both are in, or when neither are in (disconnected).