[android] #4327 - OnDoubleTap needs to trigger camera invalidation after a zoom occurs

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapView.java

@@ -694,6 +694,9 @@ public class MapView extends FrameLayout {
         } else {
             mNativeMapView.scaleBy(0.5, x / mScreenDensity, y / mScreenDensity, MapboxConstants.ANIMATION_DURATION);
         }
+
+        // work around to invalidate camera position
+        postDelayed(new ZoomInvalidator(mMapboxMap), MapboxConstants.ANIMATION_DURATION);
     }
 
     //
@@ -2543,6 +2546,21 @@ public class MapView extends FrameLayout {
         }
     }
 
+    private static class ZoomInvalidator implements Runnable{
+
+        private MapboxMap mapboxMap;
+
+        public ZoomInvalidator(MapboxMap mapboxMap) {
+            this.mapboxMap = mapboxMap;
+        }
+
+        @Override
+        public void run() {
+            // invalidate camera position
+            mapboxMap.getCameraPosition();
+        }
+    }
+
     /**
      * Definition of a map change event.
      *