Change chromium CQ global retry quota 2->1

This is an attempt to get 90% cycle time under 2 hours.

Currently cycle time is considered higher priority than false rejections,
although we try to keep both low.

BUG=none
R=sergiyb@chromium.org, tandrii@chromium.org

Review URL: https://codereview.chromium.org/1474703002 .

Cr-Commit-Position: refs/heads/master@{#361336}

infra/config/cq.cfg

@@ -26,6 +26,9 @@ verifiers {
 # chrome-eng-review per
 # https://sites.google.com/a/chromium.org/dev/developers/testing/chromium-build-infrastructure/tour-of-the-chromium-buildbot?pli=1#TOC-Adding-new-build-configurations-and-tests-to-the-main-Chromium-waterfall-Commit-Queue
   try_job {
+    try_job_retry_config {
+      global_retry_quota: 1
+    }
     buckets {
       name: "tryserver.chromium.linux"
       builders { name: "android_arm64_dbg_recipe" }