Type of pairing that is required by a particular DeviceService. This type will be passed along with the DeviceServiceDelegate deviceService:pairingRequiredOfType:withData: message.
- DeviceService does not require pairing
- DeviceService requires user interaction on the first screen (ex. pairing alert)
- First screen is displaying a pairing pin code that can be sent through the DeviceService
- DeviceService can pair with multiple pairing types (ex. first screen OR pin)
- DeviceService requires AirPlay mirroring to be enabled to connect
- DeviceService pairing type is unknown