Fix bug where LoaderManager instances were not being removed.

Change-Id: Ic8385ff60623ecd3e9fe8ff4360aef2c3b11f24f

core/java/android/app/FragmentManager.java

@@ -316,6 +316,7 @@ public class FragmentManager {
                             throw new SuperNotCalledException("Fragment " + f
                                     + " did not call through to super.onDetach()");
                         }
+                        f.mActivity.mAllLoaderManagers.remove(f.mIndex);
                         f.mActivity = null;
                     }
             }