Notify client of surface size change if it's changed from last relayout

Not just when it's changed during this relayout.

bug: 25596610

Also add the delayed surface to removal list regardless of the show
result, it won't be destroyed until window is ready to show but we
need to add it to the list first.

bug: 25666160

Change-Id: I6fceada1bdc1de0a5b5a4d6dc261957164817330