Reporting user Logged In/Out status in CN

We've recently had some questions regarding if a user was logged in/out
when they've seen a banner. So; let's report that! And add device, and
remove sitename because nothing uses it anymore.

Change-Id: I102d6c1f39740138d9534fcc37c0ec6a8149911c
Merge "Reporting user Logged In/Out status in CN"