commit cf8f68343209e3ea18d5219efcc5b485238a4a34
author Andrii Kulian <akulian@google.com> Tue Jan 23 19:43:30 2018 -0800
committer Andrii Kulian <akulian@google.com> Tue Jan 23 23:19:26 2018 -0800
tree c77e8f502a3fb07206b2f9422dd19e4f578226ce
parent 811c3765be0ecd256235b84e9d06bd53a5094c95

Set ActivityView background to current top task's color

When ActivityView is being resized to a bigger region and an app
in it hasn't received new configuration yet, it will continue
drawing in old smaller size for some time. This results in black
bars being drawn in expanded area.
This CL tracks the topmost task launched on the ActivityView and
uses its background color to fill this expanded area.

Bug: 72220802
Test: Launch activity on ActivityView, resize and observe background
Change-Id: Id7090a1ad5ec49a31c19fe185fb3815b1788e77f