Update NativeOpenStreetMapController.java (#1265)

Move compass to the right side as shown in the designer.

appinventor/components/src/com/google/appinventor/components/runtime/util/NativeOpenStreetMapController.java

@@ -76,6 +76,7 @@ import android.graphics.drawable.Drawable;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
+import android.view.ViewTreeObserver;
 import android.view.animation.Animation;
 
 class NativeOpenStreetMapController implements MapController, MapListener {
@@ -359,6 +360,14 @@ class NativeOpenStreetMapController implements MapController, MapListener {
   public void setCompassEnabled(boolean enabled) {
     if (enabled && compass == null) {
       compass = new CompassOverlay(view.getContext(), view);
+      view.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
+        @Override
+        public boolean onPreDraw() {
+          float density = view.getContext().getResources().getDisplayMetrics().density;
+          compass.setCompassCenter(view.getMeasuredWidth() / density - 35, 35);
+          return true;
+        }
+      });
       view.getOverlayManager().add(compass);
     }
     if (compass != null) {