Add schuffelen@ to OWNERS.

Bug: 111211735
Test: n/a
Change-Id: Ib8a8d6541a38ffb2d8249c6112ee9b78b6da971a
(cherry picked from commit 288f2b5d67776a4b9523d8e2c21135cc0d95c273)
diff --git a/OWNERS b/OWNERS
index fe15e48..5c0d0bd 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,5 +1,5 @@
 ghartman@google.com
 jemoreira@google.com
-pinghao@google.com
 haining@google.com
 malchev@google.com
+schuffelen@google.com