Control resize veil in transition handlers using listener

Creates a VeiledResizeAnimationListener that is passed to transition
handlers that animate the resize veil. DesktopModeWindowDecorViewModel
implements this listener in order to know when to show, resize, or hide
the resize veil.

Test: Trigger drag to desktop, toggle, and enter desktop transitions
Bug: 323884646

Change-Id: Ife93959125db5d347e3abad131d303b3e03c397d