Add hallliu@ and remove jsh@ from OWNERS

Change-Id: I6a72c3817babbf5a4ed104cdeb755a3b7b00fbfb
diff --git a/OWNERS b/OWNERS
index b215563..0786c0e 100644
--- a/OWNERS
+++ b/OWNERS
@@ -2,6 +2,6 @@
 breadley@google.com
 fionaxu@google.com
 jackyu@google.com
-jsh@google.com
+hallliu@google.com
 rgreenwalt@google.com
 tgunn@google.com