Fixed bug 4424 - Android windowed mode is broken (Thanks Jonas Thiem!)

android-project/app/src/main/java/org/libsdl/app/SDLActivity.java

@@ -1341,7 +1341,7 @@ public class SDLActivity extends Activity implements View.OnSystemUiVisibilityCh
     };
 
     public void onSystemUiVisibilityChange(int visibility) {
-        if (SDLActivity.mFullscreenModeActive && (visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0 || (visibility & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0) {
+        if (SDLActivity.mFullscreenModeActive && ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0 || (visibility & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0)) {
 
             Handler handler = getWindow().getDecorView().getHandler();
             if (handler != null) {