#1940 - DRYing out GPS Marker setup. Confirming that On / Off toggle and setup is done in correct order.

android/java/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxgl/testapp/MainActivity.java

@@ -624,6 +624,7 @@ public class MainActivity extends ActionBarActivity {
 
         @Override
         public void onMapChanged() {
+            Log.i(TAG, "onMapChanged()");
             updateMap();
         }
     }