fix(profiles): fix slow startup of gnome

at-spi-bus-launcher  starts the accessibility bus.
We need to ensure all buses are initally started by the same profile,
otherwise  the accessibility fail to start.

See #74, #80 & #235

apparmor.d/groups/bus/dbus-daemon

@@ -14,6 +14,7 @@ profile dbus-daemon @{exec_path} flags=(attach_disconnected) {
   include <abstractions/dbus-accessibility>
   include <abstractions/dbus-session>
   include <abstractions/dbus>
+  include <abstractions/dconf-write>
   include <abstractions/nameservice-strict>
 
   capability audit_write,
@@ -41,7 +42,7 @@ profile dbus-daemon @{exec_path} flags=(attach_disconnected) {
   @{bin}/ r,
 
   @{bin}/[a-z0-9]*                                                       rPUx,
-  @{lib}/{,at-spi2{,-core}/}at-spi2-registryd                             rPx,
+  @{lib}/{,at-spi2{,-core}/}at-spi-bus-launcher                           rix, # See #74, #80 & #235
   @{lib}/@{multiarch}/tumbler-1/tumblerd                                 rPUx,
   @{lib}/@{multiarch}/xfce[0-9]/xfconf/xfconfd                            rPx,
   @{lib}/*                                                               rPUx,
@@ -64,11 +65,16 @@ profile dbus-daemon @{exec_path} flags=(attach_disconnected) {
   /etc/dbus-1/{,**} r,
 
   /usr/share/dbus-1/{,**} r,
+  /usr/share/dconf/profile/gdm r,
   /usr/share/defaults/**.conf r,
+  /usr/share/gdm/greeter-dconf-defaults r,
+  /usr/share/glib-2.0/schemas/gschemas.compiled r,
 
   # Extra rules for GDM 
+  /var/lib/gdm{3,}/.config/dconf/user r,
   /var/lib/gdm{3,}/.local/share/icc/ r,
   /var/lib/gdm{3,}/.local/share/icc/edid-*.icc r,
+  /var/lib/gdm{3,}/greeter-dconf-defaults r,
 
   # Extra rules for Flatpak
   @{system_share_dirs}/dbus-1/{,**} r,
@@ -87,6 +93,7 @@ profile dbus-daemon @{exec_path} flags=(attach_disconnected) {
         @{run}/systemd/users/@{uid} r,
   owner @{run}/user/@{uid}/dbus-1/ rw,
   owner @{run}/user/@{uid}/dbus-1/services/ rw,
+  owner @{run}/user/@{uid}/gdm/Xauthority r,
   owner @{run}/user/@{uid}/systemd/notify w,
 
   @{sys}/kernel/security/apparmor/.access rw,
@@ -94,6 +101,7 @@ profile dbus-daemon @{exec_path} flags=(attach_disconnected) {
   @{sys}/module/apparmor/parameters/enabled r,
 
         @{PROC}/@{pids}/attr/apparmor/current r,
+        @{PROC}/@{pids}/cgroup r,
         @{PROC}/@{pids}/cmdline r,
         @{PROC}/@{pids}/mounts r,
         @{PROC}/@{pids}/oom_score_adj rw,