Add default lightdm setup and make sure that system user is not shown by bumping system UID_MIN

live-build/ubuntu-touch/hooks/01-setup_user.chroot

@@ -11,6 +11,9 @@ echo "$USER:$USER" | chpasswd
 
 adduser --gecos system --no-create-home --disabled-login --disabled-password system --uid 1000
 
+# Prevent the system user from being presented in the greeter by bumping MIN_UID
+sed -i 's/^\(UID_MIN\s\+\).*/\11001/g' /etc/login.defs
+
 mkdir -p /home/$USER/Music
 mkdir -p /home/$USER/Pictures
 mkdir -p /home/$USER/Videos

live-build/ubuntu-touch/includes.chroot/etc/lightdm/lightdm.conf

@@ -0,0 +1,5 @@
+[SeatDefaults]
+user-session=ubuntu-touch
+greeter-session=qml-phone-greeter
+autologin-user=phablet
+autologin-in-background=true