Skip resizing the stack when there is no current bounds.

- When initially calling loadConfigurationsAndApply(), the state is
  set to STATE_NO_PIP when there is no pinned stack.  As of change
  ag/1725150, resizeStack no longer fails silently when there is no
  such stack to resize.  This CL skips the call to resizeStack() when
  the PiP mode is set to STATE_NO_PIP.

Bug: 34692144
Test: Try and launch Fugu
Change-Id: Ic539f4431c2f94e7c10520c383fa49157d1d0631