Track in Debian: Notify the user when AppArmor blocks anything

Most of that work must happen in Debian. So u, I was thinking: what about informally adding this to your list of things you could do in case you have leftover time on your “maintain our packages in Debian” at the end of the year? Of course, that’s relevant if, and only if, the user feedback we gather indicates this should be one of our focusses.

This is blocked by https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=759604

Parent Task: #9337 (closed)

Original created by @u on 13183 (Redmine)