MultithreadingTest.MultiContextDrawWithSwapBuffers/ES3_Vulkan_SwiftShader_NoVirtual

Bug: angleproject:5099
Change-Id: I12ab4a6fb7fff8d6bc7358e6017cb10e46362b88
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2752893Reviewed-by: Ian Elliott <ianelliott@google.com>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Ian Elliott <ianelliott@google.com>