ServiceDetail service doesn't provide physical stop id for stop areas of DRT area
Example on TPC :
/onboard_mobile_app/stops_service.cms.json?todayDate=2018-10-11&service_id=4503818670704055
[ { "id": 1970539585342680, "physicalStopId": 0, "rank": 0, "name": "Route d'Antagnes", "hasBookingRequirements": true, "arrivalTime": "16:58:00", "departureTime": "16:48:00", "cityId": 1689064608630515, "cityName": "Ollon" },