Swarmed Nexus 5X bot.
Mirroring Android Release (Nexus 5X) from chromium.gpu.fyi

BUG=chromium:617848, chromium:534814

Change-Id: I773c6accd3b4023822ddb165556e3af11ff5c6b1
Reviewed-on: https://chromium-review.googlesource.com/356470Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>