[apparmor] Toward cooperation between bubblewrap and AppArmor

[Forest]

A discussion has come up about getting bubblewrap and AppArmor to cooperate.
One use case would be allowing Steam (which recently started launching games
in a bwrap container) to work in AppArmor-restricted environments like LXC.

I think some perspective from AppArmor maintainers would be valuable there:

https://github.com/containers/bubblewrap/issues/362