Merge "Reattach LauncherAppWidgetHostView to its parent after canceling drag" into sc-dev am: 4176cb33bb

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14970490

Change-Id: I5a92dc73ce2dcde24ea5fd7d826211e9d35a717e