With adaptive icons, we can have FloatingIconView match the shape
and size of the closing window, regardless of the icon shape.
FloatingIconView starts off as a rounded rect (same corners as task view)
and then morphs into the icon shape using FolderShape#createRevealAnimator
in reverse.
Decided to add FeatureFlag.ADAPTIVE_ICON_WINDOW_ANIM since there are still
some issues with folders, badges, and a visible jump when swapping the
FloatingIconView with the original icon.
Bug: 123900446
Change-Id: I94969eea6d5f4b932a84a11eb403611276042b46
