Add default code reviewers into OWNERS
am: 60ada27578

Change-Id: Id0c05ee4adaddc6a5afddd274be6e6f300decec3
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..671a4c2
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,2 @@
+shanyu@google.com
+dkrahn@google.com