Put the change to top if it has FLAG_MOVED_TO_TOP

This CL also refines the debug strings of TRANSIT_TO_FRONT and
TRANSIT_TO_BACK to make the naming rule consistent.

Fix: 283076194
Test: Swipe to home from a landscape app and quickly open it again. See
      if the home screen is on top of the app during the transition.
Change-Id: Ic8dba8c19e2447d8192898642d8499dec2a344c3