feat(profile): enable desktop user variable everywhere.

Also restrict access to these files.

apparmor.d/profiles-g-l/gsettings

@@ -18,9 +18,9 @@ profile gsettings @{exec_path} {
   /usr/share/dconf/profile/gdm r,
   /usr/share/gdm/greeter-dconf-defaults r,
 
-  /var/lib/gdm{3,}/.cache/dconf/user rw,
-  /var/lib/gdm{3,}/.config/dconf/user rw,
-  /var/lib/gdm{3,}/greeter-dconf-defaults r,
+  owner @{desktop_cache_dirs}/dconf/user rw,
+  owner @{desktop_config_dirs}/dconf/user rw,
+  owner @{DESKTOP_HOME}/greeter-dconf-defaults r,
 
   /dev/tty@{int} rw,