Include supported interface approval status in certification process
Currently, it is difficult to determine between a non-display device, and a skill that simply isn't approved for display interface.
Per Paul Cutsinger: "For speed, certification will publish your skill for voice only then come back and enable the display once that's tested. So, spot will send
this.event.context.System.device.supportedInterfaces.Display once the skill has been certified for that device."
Would be good to be able to check the status of this process somewhere.