Merge "[a11y] Fix talkback column and item count for AllAppsGrid" into main

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

@@ -124,6 +124,12 @@ public class AllAppsGridAdapter<T extends Context & ActivityContext> extends
                     getRowsNotForAccessibility(mApps.getAdapterItems().size() - 1);
         }
 
+        @Override
+        public int getColumnCountForAccessibility(RecyclerView.Recycler recycler,
+                RecyclerView.State state) {
+            return mAppsPerRow;
+        }
+
         @Override
         public void onInitializeAccessibilityNodeInfoForItem(RecyclerView.Recycler recycler,
                 RecyclerView.State state, View host, AccessibilityNodeInfoCompat info) {