GridLayoutManager margin bug

This CL fixes a bug in GLM where if a child specifies a
width with horizontal margins (or height with vertical margins)
and the GLM is set to WRAP_CONTENT, it would subtract the margins
from the child's specified width / height.

Bug: 29934904
Change-Id: Ibd21125565c72c4ed30f48262c5e2a6bb9ef002a
5 files changed