GitLab

Disables the XR browser tests on the RX 550 tester, as the tests
randomly hang indefinitely on this hardware configuration.

TBR=ynovikov@chromium.org

Bug: 1018896
Change-Id: Ie874c7df846d5133cd91fcf03eb7592e4c2b1347
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1884278Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710145}