Fix crash with LayoutTransition and ViewOverlay collision

When a View is added to a ViewGroupOverlay, it must not be parented
in another container. If it is, it will automatically be removed.
This works in general, but if there is a LayoutTransition on the
view's parent, then the actual removal will be delayed until the
transition completes. This means that the call to add(view) in
the ViewGroupOverlay's container will fail and throw an exception because
the view is still parented for the duration of the LayoutTransition.

This fix cancels the running transition to ensure that the view is not
parented prior to adding it to the overlay's container.

Issue #9303245 Crash combo: add(View) and animateLayoutChanges

Change-Id: Id4eaddccf64c353fc77e020882b978cdeb14c0ef