Merge "Fix folder crash where view is added when it already has a parent." into ub-launcher3-rvc-qpr-dev

src/com/android/launcher3/folder/Folder.java

@@ -1135,6 +1135,9 @@ public class Folder extends AbstractFloatingView implements ClipPathView, DragSo
      * Rearranges the children based on their rank.
      */
     public void rearrangeChildren() {
+        if (!mContent.areViewsBound()) {
+            return;
+        }
         mContent.arrangeChildren(getIconsInReadingOrder());
         mItemsInvalidated = true;
     }