Adding ClickToAddImageActivity example to MainActivity (#923)

* additions

* added null check

MapboxAndroidDemo/src/global/java/com/mapbox/mapboxandroiddemo/MainActivity.java

@@ -556,6 +556,14 @@ private void initializeModels() {
       null,
       R.string.activity_style_image_source_url, false, BuildConfig.MIN_SDK_VERSION
     ));
+    exampleItemModels.add(new ExampleItemModel(
+        R.id.nav_styles,
+        R.string.activity_styles_click_to_add_image_title,
+        R.string.activity_styles_click_to_add_image_description,
+        new Intent(MainActivity.this, ClickToAddImageActivity.class),
+        null,
+        R.string.activity_styles_click_to_add_image_url, false, BuildConfig.MIN_SDK_VERSION
+    ));
     exampleItemModels.add(new ExampleItemModel(
       R.id.nav_styles,
       R.string.activity_style_image_source_time_lapse_title,

MapboxAndroidDemo/src/main/java/com/mapbox/mapboxandroiddemo/examples/labs/MarkerFollowingRouteActivity.java

@@ -127,7 +127,6 @@ public void run() {
             markerIconCurrentLocation = (LatLng) markerIconAnimator.getAnimatedValue();
             markerIconAnimator.cancel();
           }
-
           if (latLngEvaluator != null) {
             markerIconAnimator = ObjectAnimator
               .ofObject(latLngEvaluator, count == 0 ? new LatLng(37.61501, -122.385374)

MapboxAndroidDemo/src/main/java/com/mapbox/mapboxandroiddemo/examples/styles/ClickToAddImageActivity.java

@@ -47,12 +47,12 @@ public class ClickToAddImageActivity extends AppCompatActivity implements
   private static final String ID_IMAGE_SOURCE = "source-id";
   private static final String CIRCLE_SOURCE_ID = "circle-source-id";
   private static final String ID_IMAGE_LAYER = "layer-id";
+  private static int PHOTO_PICK_CODE = 4;
   private MapView mapView;
   private MapboxMap mapboxMap;
   private LatLngQuad quad;
   private List<Feature> boundsFeatureList;
   private List<Point> boundsCirclePointList;
-  private static int PHOTO_PICK_CODE = 4;
   private int imageCountIndex;
 
   @Override
@@ -99,7 +99,7 @@ public boolean onMapClick(@NonNull LatLng point) {
 
     boundsFeatureList.add(Feature.fromGeometry(Point.fromLngLat(point.getLongitude(), point.getLatitude())));
 
-    // Add the click point to the circle layer and update the display of the circle layer data
+    // Add the click point to the CircleLayer and update the display of the CircleLayer data
     boundsCirclePointList.add(Point.fromLngLat(point.getLongitude(), point.getLatitude()));
 
     Style style = mapboxMap.getStyle();
@@ -130,7 +130,6 @@ public boolean onMapClick(@NonNull LatLng point) {
       pickPhotoIntent.setType("image/*");
       startActivityForResult(pickPhotoIntent, PHOTO_PICK_CODE);
     }
-
     return true;
   }
 
@@ -172,7 +171,7 @@ public void onActivityResult(int requestCode, int resultCode, final Intent data)
           @Override
           public void onStyleLoaded(@NonNull Style style) {
             Uri selectedImage = data.getData();
-            InputStream imageStream = null;
+            InputStream imageStream;
             try {
               imageStream = getContentResolver().openInputStream(selectedImage);