Vulkan: Suppress forced-xfb-emulation tests on pixel 6 ARM cannot support xfb emulation. Bug: angleproject:7376 Change-Id: If954ee7f5e4e049c107ac9fef1d84793a4c6d2b2 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3686618 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>