Add default code reviewers into OWNERS

Bug: 33166666
Test: gerrit uploader
Change-Id: Iace61d1247257c1758125bfd91c8bd5793f1e796
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..5f6aa21
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,6 @@
+# Default code reviewers picked from top 3 or more developers.
+# Please update this list if you find better candidates.
+flooey@google.com
+narayan@google.com
+prb@google.com
+tobiast@google.com
\ No newline at end of file