InputSettings: Fix incorrect keyboard list on rotation.

In this situation onLoadFinished callback is triggered before the
loader ids list is updated. Updated the loader ids list before
triggering the loader.

Bug: 28182232
Change-Id: I1e4035f4dcff33e6b9a42d448303e962bd87c14b

src/com/android/settings/inputmethod/PhysicalKeyboardFragment.java

@@ -206,9 +206,9 @@ public final class PhysicalKeyboardFragment extends SettingsPreferenceFragment
             clearLoader();
             mLastHardKeyboards.clear();
             mLastHardKeyboards.addAll(newHardKeyboards);
+            mLoaderIDs.add(mNextLoaderId);
             getLoaderManager().initLoader(mNextLoaderId, null,
                     new Callbacks(getContext(), this, mLastHardKeyboards));
-            mLoaderIDs.add(mNextLoaderId);
             ++mNextLoaderId;
         }
     }