Sensor fusion app

9/5/2023

The main change in v2.0b22 is to update the Android APIs used such that the app can be found and installed on newer versions of Android.

Minor changes:
* Add a prominent notice that location data can be collected in the background during logging and streaming, as mandated by the google guidelines.
* Logged data files should now be easier to find, as they appear in the Download folder.
* Minor updates needed to use newer android releases.
* Various stability fixes.