Fixed an issue where the media would reappear animated

View.isShown doesn't take into account if a view is
faded away so we assumed that we should animate
the transition. We're now excluding those views.
This was reproducible when unlocking from the
bouncer with media present.

Fixes: 160217095
Test: add media, swipe up, unlock with pin or fingerprint
Change-Id: I3b3e65ebefc4f1f11b357cf9a4e5c00dbd4b6723