Animate to bottom view in app => overview

We always want to animate to the bottom so we should just do that if we
have the view laid out even if at the time the app task doesn't actually
match the view.

Bug: 114136250
Test: Go to recents, press overview twice quickly, see it animate
correctly
Change-Id: I0516ef127ff6ef0f865c85314c9ffe4a7c6ef9e3
(cherry picked from commit 86957f28)