Merge "Avoid reparenting an invalid leash." into main

            // TODO(b/397646693): remove this exception.

            val isEligibleForReparenting = controller.isLaunching

            val viewRoot = controller.transitionContainer.viewRootImpl

            val skipReparenting = skipReparentTransaction || viewRoot == null

            val skipReparenting =

                skipReparentTransaction || !window.leash.isValid || viewRoot == null

            if (moveTransitionAnimationLayer() && isEligibleForReparenting && !skipReparenting) {

                reparent = true

            }