Allow resizing out of invalid size

If app bounds are already below min width/ height, allow bounds to be
increased. If app bounds already excced max width/ height, allow bounds
to be decreased.

Flag: NONE(bug fix)
Fixes: 367875464
Fixes: 368077155
Test: atest WMShellUnitTests:DragPositioningCallbackUtilityTest
Change-Id: Icbad1a29b5e01bec50711da1456c7eb700796d8f