Prevent scrolling after the homepage recreating

- Only apply the layout transition when contextual home is enabled
- Do not scroll for highlighting when the homepage is recreated and
  never scrolled

Fix: 222238012
Bug: 222473415
Test: robotest, manual
Change-Id: I490c3f8dbca63a5250bae01555592b7795c90af2

src/com/android/settings/widget/HighlightableTopLevelPreferenceAdapter.java

@@ -67,10 +67,12 @@ public class HighlightableTopLevelPreferenceAdapter extends PreferenceGroupAdapt
     private SparseArray<PreferenceViewHolder> mViewHolders;
 
     public HighlightableTopLevelPreferenceAdapter(SettingsHomepageActivity homepageActivity,
-            PreferenceGroup preferenceGroup, RecyclerView recyclerView, String key) {
+            PreferenceGroup preferenceGroup, RecyclerView recyclerView, String key,
+            boolean scrollNeeded) {
         super(preferenceGroup);
         mRecyclerView = recyclerView;
         mHighlightKey = key;
+        mScrolled = !scrollNeeded;
         mViewHolders = new SparseArray<>();
         mContext = preferenceGroup.getContext();
         mHomepageActivity = homepageActivity;