Fixed an issue where the footerview and others would fly over the screen

Because we were placing them at their current positions instead of
the viewstates position, the view could be placed completely wrong.
This also fixes that this logic didn't actually apply to decor views
as those don't generate an add / remove animation.

Fixes: 188529208
Test: add notifications, drag down on lockscreen, observe no footer flying
Change-Id: Ie44d6a8e668dc092670f007d7979750e9041a4f9