Added a simple fix to override persisted window mode.

In Task.java we havent updated to check Task Display Area instead of
display to tell if we should or should not persist the windowing mode.
This corrects that.

Bug: 265114439
Test: Manually tested, open the app in tablet mode, close, then open in
desktop mode and verfiy it isnt full screen

Change-Id: Ice3462e4dda92dd3695a3a1eea01d58a5ca9d753