Specifies an audio clip to be played by the client as part of
the response.
Attributes:
audio_uri (str):
Required. URI of the audio clip. Dialogflow
does not impose any validation on this value. It
is specific to the client that reads it.
allow_playback_interruption (bool):
Output only. Whether the playback of this
message can be interrupted by the end user's
speech and the client can then starts the next
Dialogflow request.
