Called when NoType:android/content/Loader$ForceLoadContentObserver;Href=../../../reference/android/content/Loader.ForceLoadContentObserver.html detects a change. The default implementation checks to see if the loader is currently started; if so, it simply calls Loader.ForceLoad; otherwise, it sets a flag so that Loader.TakeContentChanged returns true.
Must be called from the process's main thread.