Update shell ownership

Flag: EXEMPT update to OWNERS file
Change-Id: I6649ed12acb5eaa4470b1fdd7f6aff528b227648
diff --git a/packages/Shell/OWNERS b/packages/Shell/OWNERS
index 177f86b..8feefa5 100644
--- a/packages/Shell/OWNERS
+++ b/packages/Shell/OWNERS
@@ -1,5 +1,6 @@
 set noparent
 
+ronish@google.com
 jsharkey@android.com
 felipeal@google.com
 nandana@google.com