Support casting to a Google speaker / Chromecast

[timkgh]

Checklist

• I've checked that there is no other issue about this feature request.
• This issue contains only one feature request.
• The title of this issue accurately describes the feature request.

Feature description

Support casting to a Google speaker / Chromecast, e.g. Nest Audio speaker.

Why do you want this feature?

Easy play to a Chromecast enabled speaker.

Additional information

No response

[timkgh]

Same for Alexa/Echo speakers if possible.

[Nolli20]

It is a good idea

[z-huang]

Do you have any screen recording of what it is like to cast to Google speeker/Chromecast/Alex/Echo?

[Nolli20]

I am not at home, when I come back tonight or tomorrow I will send you this

[Nolli20]

Do you have any screen recording of what it is like to cast to Google speeker/Chromecast/Alex/Echo?

Here is
https://imgur.com/a/BFKk8Eb