cq.cfg: equivalent_to to 100% for Android tryservers. This is moving all ANGLE Android tryservers to run on LUCI only. BUG=chromium:731958 BUG=chromium:759301 Change-Id: I302338b462f51c260afafc69aefff7bfdd89e87a Reviewed-on: https://chromium-review.googlesource.com/972610 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>