data: Start calls as part of gnome-session

Since the "calls daemon" is the full app we depend on session services
and portls. Start within gnome-session startup to make sure we don't
start too early.

Closes: https://gitlab.gnome.org/GNOME/calls/-/issues/690

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Part-of: <https://gitlab.gnome.org/GNOME/calls/-/merge_requests/771>

data/calls-daemon.service.in

@@ -1,6 +1,8 @@
 [Unit]
 Description=A phone dialer and call handler (daemon mode)
-PartOf=graphical-session.target
+PartOf=gnome-session.target
+Requisite=gnome-session-initialized.target
+After=gnome-session-initialized.target
 
 [Service]
 BusName=org.gnome.Calls
@@ -8,4 +10,4 @@ ExecStart=@bindir@/gnome-calls --daemon
 Type=dbus
 
 [Install]
-WantedBy=graphical-session.target
+WantedBy=gnome-session.target