Fix snapshots not updating on app => overview.

Previously we were only updating the model on snapshot update and not
the view itself, so the view would have an outdated snapshot if it
loaded everything before the data updated itself.

Bug: 114136250
Fixes: 130635650
Test: Go from app to overview, transitions properly with new snapshot
Change-Id: Ife9cae7a700a855788b5d25b05d78e562e1b27f0
(cherry picked from commit 025799ba)