Reset alpha of wallpaper token when it is wrapped in transition

In case the alpha was set to 0 by previous transition and the next
transition needs to use rotation wrapper surface, the attribute
of the wrapped surface won't be updated by the animation handler.

Bug: 425033802
Flag: EXEMPT bugfix
Test: Force an animator to set alpha 0 for wallpaper and swipe to
      portrait home from a landscape app.
Change-Id: I3509af4d7c7cb70d075e7e91c736b70e04589594