Adding graphic for all apps empty search screen.

Change-Id: I976a327a5984790c458b0f36d33c0b1ac16ec59c

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

@@ -615,13 +615,14 @@ public class AllAppsContainerView extends BaseContainerView implements DragSourc
         if (apps != null) {
             mApps.setOrderedFilter(apps);
             mAdapter.setLastSearchQuery(query);
-            mAppsRecyclerView.scrollToTop();
+            mAppsRecyclerView.onSearchResultsChanged();
         }
     }
 
     @Override
     public void clearSearchResult() {
         mApps.setOrderedFilter(null);
+        mAppsRecyclerView.onSearchResultsChanged();
 
         // Clear the search query
         mSearchQueryBuilder.clear();