That sucks - unless I can get immersive mode that rules out using AppGameKit
Is there any way I can export a full Android project rather than just an .apk? I could then take a look at editing the main java activity myself. All it needs is to call a method like this from the OnCreate method of the main activity:
private void hideSystemUi() {
getWindow().getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_IMMERSIVE);
}