Add self and Lutz to OWNERS for saml

Change-Id: I831192ae4d928137486098272df4969a5a7463bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1643547Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Commit-Queue: A Olsen <olsen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665899}

chrome/browser/chromeos/login/saml/OWNERS

@@ -2,4 +2,6 @@
 xiyuan@chromium.org
 
 # (in CET)
+ljusten@chromium.org
+olsen@chromium.org
 rsorokin@chromium.org