Add default code reviewers into OWNERS

Bug: 33166666
Test: gerrit uploader
Change-Id: Ie9d3553f92b6ad5763b73ff6ca88f9425ec425bf
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..26ebc9d
--- /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.
+jplemieux@google.com
+yukl@google.com