infra: Remove Pixel 2 (android_vk) tests from CQ. These tests are now fully running on the Pixel 4. Bug: angleproject:5941 Change-Id: Ic0bb094c917226867c3b34ede19986e95ce69b7f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2915565 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>