Ensure recents scrolled to first task in landscape

The app should animate to the bottom view which means we should ensure
the bottom view is scrolled to be visible at the bottom when we animate
in. Note that this is only a consideration in landscape since in
portrait, all tasks are always visible and the recyclver view is not
scrollable.

Bug: 114136250
Test: Go to recents Go from app in landscape mode
Change-Id: If4ea35759cc881f2c32565368d031620b62a45dd
(cherry picked from commit 64bb5bbb)