Use registered users in toolchain-utils/OWNERS.

AOSP project owners should be registered in Gerrit Code Review.

Bug: 33166666
Test: default build targets
Change-Id: I1196d33f47283f2f6ba8d7373190dcf9a2d80934
diff --git a/OWNERS b/OWNERS
index 5209f14..73ac927 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,9 +1,10 @@
 set noparent
-cmtice@chromium.org
-gbiv@chromium.org
-laszio@chromium.org
-llozano@chromium.org
-rahulchaudhry@chromium.org
-yunlian@chromium.org
-zhizhouy@chromium.org
-bjanakiraman@chromium.org
+cmtice@google.com
+gbiv@google.com
+laszio@google.com
+llozano@google.com
+manojgupta@google.com
+rahulchaudhry@google.com
+yunlian@google.com
+zhizhouy@google.com
+# bjanakiraman@chromium.org