Adding back recents grow in split screen

There was a regression where recents stopped growing when in split
screen and bottom app has less height than top. Then when pressing
recents button it would go into recents on bottom split and divider
would move to the center.

Test: manual - split with 2 apps, lower divider, press recents button
Fixes: 62431729
Change-Id: I3cacb4e4bd38a17602415ebee4e24a517115bbdd