v2.3.1: updated libGDX to 1.12.1 and mobiVM to 2.3.20

android/src/main/java/com/shatteredpixel/shatteredpixeldungeon/android/AndroidLauncher.java

@@ -110,6 +110,8 @@ public class AndroidLauncher extends AndroidApplication {
 					ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE :
 					ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT );
 		}
+
+		//TODO libGDX offers its own immersive mode functionality, do we want to use it?
 		
 		AndroidApplicationConfiguration config = new AndroidApplicationConfiguration();
 		config.depth = 0;