Merge "Enabling accessibility drag and drop in folder" into ub-launcher3-burnaby

src/com/android/launcher3/ButtonDropTarget.java

@@ -226,6 +226,9 @@ public abstract class ButtonDropTarget extends TextView
                 DragLayer.ANIMATION_END_DISAPPEAR, null);
     }
 
+    @Override
+    public void prepareAccessibilityDrop() { }
+
     @Thunk abstract void completeDrop(DragObject d);
 
     @Override