Enable vulkan on pixel resource tests

Enable the blending and masks tests that are passing on Vulkan, and add
TODOs for the rest.

Bug: 963446
Change-Id: I384d97772be9ae9c96b7695e94423ecfaf848737
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1673440
Reviewed-by: enne <enne@chromium.org>
Commit-Queue: Sean Gilhuly <sgilhuly@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672171}
3 files changed