Show system bar above application

[jb55]

Depends on:

• https://github.com/damus-io/android/issues/75

Once we switch to GameActivity, we have the opportunity to fix the issue where the app is below the system bar. It looks like @lucasmerlin and @ardocrat has made some progress here:

• https://github.com/rust-mobile/android-activity/issues/96#issuecomment-1658558174

Things to consider:

• Do cutouts extend beyond system bar? If so we need to account for that

• To have an immersive scroll experience, it might be a good idea to not pad during scrolling, so we scrolling appears all the way to the top edge of the device. Need to figure out the logistics of this.