Merge "Use CopyOnWriteArrayList to avoid ConcurrentModificationException." into tm-qpr-dev am: d7898e6083 am: 70460864a4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/20613560

Change-Id: Iac804ff6439ae85be850e19f9bf265b13b538d39
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

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

@@ -31,8 +31,8 @@ import androidx.recyclerview.widget.RecyclerView.Adapter;
 import com.android.launcher3.util.ScrollableLayoutManager;
 import com.android.launcher3.views.ActivityContext;
 
-import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 /**
  * The grid view adapter of all the apps.
@@ -44,7 +44,8 @@ public class AllAppsGridAdapter<T extends Context & ActivityContext> extends
 
     public static final String TAG = "AppsGridAdapter";
     private final AppsGridLayoutManager mGridLayoutMgr;
-    private final List<OnLayoutCompletedListener> mOnLayoutCompletedListeners = new ArrayList<>();
+    private final CopyOnWriteArrayList<OnLayoutCompletedListener> mOnLayoutCompletedListeners =
+            new CopyOnWriteArrayList<>();
 
     /**
      * Listener for {@link RecyclerView.LayoutManager#onLayoutCompleted(RecyclerView.State)}