Ship an AppArmor profile for Icedove in Tails

https://raw.githubusercontent.com/Whonix/apparmor-profile-icedove/master/etc/apparmor.d/usr.lib.icedove.icedove

The profile should be tested in a Tails context first.

Feature Branch: 451f:tails/feature/11058+apparmor_icedove

Related issues

• Related to #11058 (closed)
• Related to #11964 (closed)

Original created by @u on 10750 (Redmine)