Reenable LUCI notifications on the ART Buildbot AOSP builders.

The clean steps on the AOSP builders (aosp-builder-cc and
aosp-builder-cms) used to call "make clean", which sometimes failed
with this error:

  Failed to remove file "out/.module_paths":
  unlinkat out/.module_paths: directory not empty

As a result the LUCI notitications for these builders were disabled.

The clean steps are now using "rm -rf out" instead of "make clean",
which presubmably addressed the previous issue. Reenable the LUCI
notifications for aosp-builder-cc and aosp-builder-cms.

Test: Rely on the ART Buildbot
      (https://ci.chromium.org/p/art/builders/ci/aosp-builder-cc
      and https://ci.chromium.org/p/art/builders/ci/aosp-builder-cms)
Bug: 139655167
Bug: 131573205

Change-Id: I38f31d2ccf1f337698aaf463d90efc593c666976
diff --git a/tools/luci/config/luci-notify.cfg b/tools/luci/config/luci-notify.cfg
index 5b54c2d..994cdfd 100644
--- a/tools/luci/config/luci-notify.cfg
+++ b/tools/luci/config/luci-notify.cfg
@@ -39,15 +39,14 @@
     name: "angler-armv8-ndebug"
     bucket: "ci"
   }
-#  TODO(ngeoffray): enable notifications for the aosp builders once b/131573205 is resolved
-#  builders {
-#    name: "aosp-builder-cc"
-#    bucket: "ci"
-#  }
-#  builders {
-#    name: "aosp-builder-cms"
-#    bucket: "ci"
-#  }
+  builders {
+    name: "aosp-builder-cc"
+    bucket: "ci"
+  }
+  builders {
+    name: "aosp-builder-cms"
+    bucket: "ci"
+  }
   builders {
     name: "bullhead-armv7-gcstress-ndebug"
     bucket: "ci"