Custom Commands Integration with DirectLine Speech

[manish-95]

This issue is for a: (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Expected/desired behavior

A sample that combines Custom Commands with Directline Speech, showing the capabilities of Custom Commands in conjunction with a Bot. This could also show how this combination varies from a simple Bot connected via DirectLine, with speech capabilities enabled

OS and Version?

Windows 7, 8 or 10. Linux (which distribution). macOS (Yosemite? El Capitan? Sierra?)

[albanoandrea]

Don't know if it was the purpose of this post, but we would like to send some information from the device to the bot to take a decision, without any other big modification.
For starting it would be enough to send a single string, but it would be nice to send a json.

We have successfully sent custom data from the Bot to the device in this way:

                    Activity my_activity = new Activity();
                    my_activity.Type = "custom";
                    my_activity.Action = "Turn on";
                    await turnContext.SendActivityAsync(my_activity, cancellationToken);

But on the opposite side we would like to send the information together with the audio, so that the Bot will receive it when the STT recognize the intent.