Override INTERPOLATOR_WITHIN_ALL_APPS when app restarts.

Bug: 225185551
Test: manual. See video https://drive.google.com/corp/drive/u/0/folders/1g-YlbzdHh49SH0f4xLli4BmVqPCP6K49
Flag: the flash issue is only for QS Tile under ENABLE_QS_TILES(OFF)
Change-Id: Ib282148bc0a4943c91b5ebd3c78b7128d5d66c9d

src/com/android/launcher3/allapps/ActivityAllAppsContainerView.java

@@ -1254,6 +1254,11 @@ public class ActivityAllAppsContainerView<T extends Context & ActivityContext>
         rv.addOnScrollListener(mScrollListener);
     }
 
+    /** Returns the instance of @{code SearchTransitionController}. */
+    public SearchTransitionController getSearchTransitionController() {
+        return mSearchTransitionController;
+    }
+
     /** Holds a {@link BaseAllAppsAdapter} and related fields. */
     public class AdapterHolder {
         public static final int MAIN = 0;