Add more owners for Nearby code.

Test: n/a, owners change

Change-Id: I4531832ce9c68230ee4e6e4b8fcd0ce5e29da87f
diff --git a/nearby/OWNERS b/nearby/OWNERS
index 980c221..844ef06 100644
--- a/nearby/OWNERS
+++ b/nearby/OWNERS
@@ -1,4 +1,6 @@
+chenw@google.com
 chunzhang@google.com
 weiwa@google.com
 weiwu@google.com
+xinhe@google.com
 xlythe@google.com