Longpress overview in minimized mode only for resizable launches (1/2)

Since resizable launchers in minimized mode shows more of the docked
stack than in non-resizable launchers, it will play the same
functionality as split screen where long press overview button will
exit split screen into fullscreen mode.

Test: test was written - adb shell am instrument -w -e class
com.android.androidbvt.SysUIMultiWindowTests
com.android.androidbvt/android.support.test.runner.AndroidJUnitRunner
Fixes: 34892561
Change-Id: I9f957dada1b325b36068d59fa9b2d1fa4912b804