Add vichang@, behdad@ into OWNER

vichang@: contributed 3 CLs. Closely related project external/icu owner
behdad@: He owns the upstream code.
jsauer@: The user no longer exists

Test: gerrit uploader
Change-Id: Ibfc28f534514ebf20bfd92dbad07bd2fd6703882
diff --git a/OWNERS b/OWNERS
index 124fe1e..8d0c51e 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,8 +1,7 @@
-# Default owners are top 3 active developers of the past 1 or 2 years
-# or people with more than 10 commits last year.
-# Please update this list if you find better owner candidates.
+# Default code reviewers picked from top 3 or more developers.
+# Please update this list if you find better candidates.
 ccross@android.com
 byi@google.com
-chh@google.com
 jgaillard@google.com
-jsauer@google.com
+vichang@google.com
+behdad@google.com