Create an overlay to add a photo and video deletion helper service.

This overlay defines a checkbox preference in the deletion helper for
facilitating the deletion of photos and videos. The service which
provides deletion clearing can be overridden and used to create a
custom photo and video deletion helper.

Bug: 28554187
Bug: 28560856

Change-Id: Id5d9671a307aaac0d1331f055b8f2ab7aa67977c

src/com/android/settings/overlay/FeatureFactoryImpl.java

@@ -28,4 +28,9 @@ public final class FeatureFactoryImpl extends FeatureFactory {
         return null;
     }
 
+    @Override
+    public DeletionHelperFeatureProvider getDeletionHelperFeatureProvider() {
+        return null;
+    }
+
 }