Turn on the power to the TV connected to a FireTV Cube from a skill
When a user invokes a Skill on a Fire TV Cube, provide a way for our fulfillment webhook to determine that the device is a Fire TV Cube. We know we can determine that the skill was invoked on a device that has a screen, but we need a way to determine that it is not an Echo Show or Spot, but instead a TV connected to a FireTV Cube.
Then, provide a way to determine whether or not the TV power is on or off. If it is off, provide a way for us to tell the Cube to turn on the power to the TV so that video will display.