on Vulkan Pixel2 and SwiftShader.

Ignore device and vendor in test config
if we are running on SwiftShader.

Bug: angleproject:5500
Change-Id: Ib07240dfe1c2ae1d6d081ffa389d041d97b22b36
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2611309Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Ian Elliott <ianelliott@google.com>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>