Verify available device_type

[maxkoryukov]

Seems, like JSON contains obsolete list of device types (https://github.com/route4me/route4me-json-schemas/blob/master/RouteParameters.dtd#L186)

At least, there is no way to set device_type = vehicle

From one of the APIs:

device_type ENUM(vehicle, smartphone, smartwatch, iot_asset);