Because Perf bots have Android K with worse driver than GPU.FYI Android L

BUG=angleproject:2431

Change-Id: I9b7a7d34f64a9832c57f9d26573b7c63594e1773
Reviewed-on: https://chromium-review.googlesource.com/986653Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>