volvooncall: fix missing property. see vehicle when discovered. (#6144)

homeassistant/components/device_tracker/volvooncall.py

@@ -31,5 +31,6 @@ def setup_scanner(hass, config, see, discovery_info=None):
                  vehicle.position['longitude']))
 
     hass.data[DOMAIN].entities[vin].append(see_vehicle)
+    see_vehicle(vehicle)
 
     return True

homeassistant/components/switch/volvooncall.py

@@ -42,6 +42,7 @@ class VolvoSwitch(VolvoEntity, ToggleEntity):
         """Return the name of the switch."""
         return 'Heater'
 
+    @property
     def icon(self):
         """Return the icon."""
         return 'mdi:radiator'