Add dynamic scene creation/transition capability

Add TransitionManager.beginDelayedTransition() to handle starting a transition
on the next frame for a given scene root based on all changes that
take place between the first call to that method and the next animation frame.

Issue #9321937 Transitions: consider batching up multiple scene actions

Change-Id: I3fc92b6b4ec5ff42b1e678bcfd385703e32eba2a