Run flatpak with exported variables

https://github.com/flatpak/flatpak/issues/3847#issuecomment-818532856

roles/flatpak/templates/flatpak-automatic.service.j2

@@ -0,0 +1,10 @@
+[Unit]
+Description=flatpak Automatic Update
+Documentation=man:flatpak(1)
+
+[Service]
+Environment='DISPLAY={{ ansible_facts["env"]["DISPLAY"] }}'
+Environment='DBUS_SESSION_BUS_ADDRESS={{ ansible_facts["env"]["DBUS_SESSION_BUS_ADDRESS"] }}'
+Type=simple
+ExecStartPre=nm-online
+ExecStart=/usr/bin/flatpak update -y

roles/flatpak/templates/flatpak-automatic.timer.j2

@@ -0,0 +1,11 @@
+[Unit]
+Description=flatpak Automatic Update Trigger
+Documentation=man:flatpak(1)
+
+[Timer]
+OnBootSec=1m
+OnCalendar=*-*-* *:00:00
+Persistent=true
+
+[Install]
+WantedBy=timers.target