Include a shared media team OWNERS for easier management

Bug: 162786146
Test: n
Change-Id: I0e6df62079738a0c91f638b77c39d28319ad27b8
diff --git a/OWNERS b/OWNERS
index 40cd394..59aeb67 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,3 +1,4 @@
-# Default code reviewers picked from top 3 or more developers.
-# Please update this list if you find better candidates.
+# owners for external/libaom
+include platform/frameworks/av:/media/janitors/OWNERS-codecs
 essick@google.com
+jzern@google.com