Update OWNERS to be more specific

Still to do ... media/OWNERS

Test: Gerrit works as expected
Change-Id: I2645175569b579764d0298641287e56bfabeab9f
diff --git a/services/OWNERS b/services/OWNERS
index d500dce..d5d00da 100644
--- a/services/OWNERS
+++ b/services/OWNERS
@@ -1,4 +1,4 @@
 elaurent@google.com
 etalvala@google.com
-gkasten@android.com
+gkasten@google.com
 hunga@google.com