Remove in app language menu

[davecraig]

The code to do this is here:
https://github.com/davecraig/Soundscape-AndroidTest/tree/remove-in-app-language

I considered landing this in #300 but decided to do the minimum fix in the meantime to make the regional language variations work. This left in app language support available when the phone is pre-Android 13. At some point, when more phones are Android 13+ we should land these changes which simplifies our app and makes it less non-standard.