Notify TaskViews of updated orientation state

There was a race condition between when recent
tasks get loaded for overview and when the
RecentsOrientationState gets updated based on
which orientation was touched. Now notify
tasks view every time orientation state
updates.

Fixes: 160912655
Test: Kill launcher while landscape app
is open then swipe up to recents.
App in correct location.

Change-Id: If2b239f748c000257bd91b14a23d68ba026e3a48