Add default code reviewers into OWNERS
am: c1d66bdef2

Change-Id: Ic92e3077d5ef05cdcabb3c633a56cd9866a783d7
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..ac2cb6d
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,4 @@
+# Default code reviewers picked from top 3 or more developers.
+# Please update this list if you find better candidates.
+nfuller@google.com
+vichang@google.com