luci: Enable android-pie-arm64-rel on CQ with 20% experimentally

Bug: 1111436
Change-Id: I8292f16d83847cd2cf3489e9aa6771dcb11a4a9f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2413112Reviewed-by: Erik Staab <estaab@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Haiyang Pan <hypan@google.com>
Cr-Commit-Position: refs/heads/master@{#807669}

infra/config/generated/commit-queue.cfg

@@ -279,7 +279,10 @@ config_groups {
       }
       builders {
         name: "chromium/try/android-pie-arm64-rel"
-        includable_only: true
+        experiment_percentage: 20
+        location_regexp: ".*"
+        location_regexp_exclude: ".+/[+]/docs/.+"
+        location_regexp_exclude: ".+/[+]/infra/config/.+"
       }
       builders {
         name: "chromium/try/android-pie-arm64-wpt-rel-non-cq"

infra/config/generated/cq-builders.md

@@ -350,6 +350,9 @@ as required builders.
 * [android-marshmallow-x86-rel](https://ci.chromium.org/p/chromium/builders/try/android-marshmallow-x86-rel) ([definition](https://cs.chromium.org/search?q=package:%5Echromium$+file:/cq.star$+-file:/beta/+-file:/stable/+android-marshmallow-x86-rel)) ([matching builders](https://cs.chromium.org/search?q=+file:trybots.py+android-marshmallow-x86-rel))
   * Experiment percentage: 5
 
+* [android-pie-arm64-rel](https://ci.chromium.org/p/chromium/builders/try/android-pie-arm64-rel) ([definition](https://cs.chromium.org/search?q=package:%5Echromium$+file:/cq.star$+-file:/beta/+-file:/stable/+android-pie-arm64-rel)) ([matching builders](https://cs.chromium.org/search?q=+file:trybots.py+android-pie-arm64-rel))
+  * Experiment percentage: 20
+
 * [fuchsia-compile-x64-dbg](https://ci.chromium.org/p/chromium/builders/try/fuchsia-compile-x64-dbg) ([definition](https://cs.chromium.org/search?q=package:%5Echromium$+file:/cq.star$+-file:/beta/+-file:/stable/+fuchsia-compile-x64-dbg)) ([matching builders](https://cs.chromium.org/search?q=+file:trybots.py+fuchsia-compile-x64-dbg))
   * Experiment percentage: 50
 

infra/config/generated/luci-milo.cfg

@@ -3182,6 +3182,9 @@ consoles {
   builders {
     name: "buildbucket/luci.chromium.try/android-pie-arm64-dbg"
   }
+  builders {
+    name: "buildbucket/luci.chromium.try/android-pie-arm64-rel"
+  }
   builders {
     name: "buildbucket/luci.chromium.try/android_compile_dbg"
   }

infra/config/subprojects/chromium/try.star

@@ -321,10 +321,11 @@ try_.chromium_android_builder(
     cores = 16,
     goma_jobs = goma.jobs.J300,
     ssd = True,
-    # TODO(crbug.com/1111436): Enable on CQ once the maintenance for
-    # Pixel 2 devices are finished.
-    #main_list_view = settings.main_list_view_name,
-    #tryjob = try_.job(),
+    # TODO(crbug.com/1111436): Enable on CQ fully once the tests run fine.
+    main_list_view = settings.main_list_view_name,
+    tryjob = try_.job(
+        experiment_percentage = 20,
+    ),
 )
 
 try_.chromium_android_builder(