Android: fix NoSuchMethodException exception in QtActivity.java

This amends the parent change but intended only for dev and not
to be picked for 5.15.

Change-Id: If7a2d81045c0625f19554eaf6b5cf69e72d42384
Reviewed-by: Andy Shaw <andy.shaw@qt.io>

src/android/java/src/org/qtproject/qt5/android/bindings/QtActivity.java

@@ -1084,6 +1084,11 @@ public class QtActivity extends Activity
         QtNative.activityDelegate().setSurfaceGeometry(id, x, y, w, h);
     }
 
+    public void setSystemUiVisibility(int systemUiVisibility)
+    {
+        QtNative.activityDelegate().setSystemUiVisibility(systemUiVisibility);
+    }
+
     public void showSoftwareKeyboard(final int x, final int y, final int width,
                                      final int height, final int inputHints,
                                      final int enterKeyType)