Add default code reviewers into OWNERS

Bug: 33166666
Test: gerrit uploader
Change-Id: I6f35e1234694c4ac91b77bbbb9acd0da7ea80cba
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..b0cd1f7
--- /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.
+tomtaylor@google.com
+paulduffin@google.com
+aurimas@google.com
+rtenneti@google.com