Sensor fusion app

Sep 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.