Capabilities the device surface supports at the time of the request.
|Unspecified surface capability.
|Device can speak to the user via text-to-speech or SSML.
|Device can display rich responses like cards, lists and tables.
|Device can play long form audio media like music and podcasts.
|Device can display a interactive canvas response.
|Device can use web links in rich responses to open a web browser.
|Device can support saving and fetching home storage.