Roll vulkan-validation-layers. (1/2) https://android.googlesource.com/platform/external/vulkan-validation-layers.git/+log/bcb80d06bbdc09..f47c534fee2f26f Disables Vulkan in ANGLE temporarily - a second CL will follow with the updated build files once ANGLE is rolled into Chrome. In particular, this roll contains a fix for a vs2017 signed/unsigned mismatch warning as error. BUG=chromium:683729 Change-Id: Ib23370d79f1359ab290f08e14a847eed75251660 Reviewed-on: https://chromium-review.googlesource.com/458531 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>