Add default code reviewers into OWNERS

Bug: 33166666
Test: gerrit uploader
Change-Id: Iae9e1ba372eb1f3971b2c19d019cc9fc568b8692
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..7e705e3
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,5 @@
+# Default code reviewers picked from top 3 or more developers.
+# Please update this list if you find better candidates.
+mbouyack@google.com
+sanek@google.com
+tkryger@google.com