Clean departed users from OWNERS files

We've had turnover in the media team; it's time to clean the departed
users and add the new users.

Bug: 203731695
Test: repo upload
Change-Id: I8f6249d94706333bbd2aa23e30445cf3657f743c
diff --git a/cmds/OWNERS b/cmds/OWNERS
index 0d32aac..a48c37a 100644
--- a/cmds/OWNERS
+++ b/cmds/OWNERS
@@ -1,3 +1,3 @@
 elaurent@google.com
+essick@google.com
 lajos@google.com
-marcone@google.com