Maintain Talkback / Voice Access / etc. focus after moving item in Workspace.

Bug: 383456105
Test: Verified this works well manually.
Flag: EXEMPT bug fix
Change-Id: I35377443c4800a53cfa539c7061d5ef1b8b27837

src/com/android/launcher3/Workspace.java

@@ -109,6 +109,7 @@ import com.android.launcher3.model.data.WorkspaceItemInfo;
 import com.android.launcher3.pageindicators.PageIndicator;
 import com.android.launcher3.statemanager.StateManager;
 import com.android.launcher3.statemanager.StateManager.StateHandler;
+import com.android.launcher3.statemanager.StateManager.StateListener;
 import com.android.launcher3.states.StateAnimationConfig;
 import com.android.launcher3.touch.WorkspaceTouchListener;
 import com.android.launcher3.util.EdgeEffectCompat;
@@ -2241,6 +2242,23 @@ public class Workspace<T extends View & PageIndicator> extends PagedView<T>
             }
             mStatsLogManager.logger().withItemInfo(d.dragInfo).withInstanceId(d.logInstanceId)
                     .log(LauncherEvent.LAUNCHER_ITEM_DROP_COMPLETED);
+
+            if (mAccessibilityDragListener != null) {
+                // This code needs to be called after StateManager.cancelAnimation. Before changing
+                // the order of operations in this method related to the StateListener below, please
+                // test that accessibility moves retain focus after accessibility dropping an item.
+                // Accessibility focus must be requested after launcher is back to a normal state
+                mLauncher.getStateManager().addStateListener(new StateListener<LauncherState>() {
+                    @Override
+                    public void onStateTransitionComplete(LauncherState finalState) {
+                        if (finalState == NORMAL) {
+                            cell.performAccessibilityAction(
+                                    AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS, null);
+                            mLauncher.getStateManager().removeStateListener(this);
+                        }
+                    }
+                });
+            }
         }
 
         if (d.stateAnnouncer != null && !droppedOnOriginalCell) {