Re-enable ShouldClearOpaqueFdRGBA8 on Pixel2 Vulkan Bug: angleproject:4630 Change-Id: Ib1e7ecd9bedf6841489f7fb5bba9cae8881aa33e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2229067 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>