Note: native Android v10.4.0 is needed for this

I don't believe the millicast subscriber token should be added here. @GillesMoris-Dolby @turbidwater @RameshDPrasad since auth token is consumed via the theolive API instead, we shouldn't add that field here. Correct me if I am wrong.

@wjoosen @Yousif-CS For what it's worth, in Web we're adding it this way, where it prefers the information from the theoLive.authToken field, but also could accept it from the discovery response:
subscriberToken: this._authToken ?? endpoint.millicastSrc.subscriberToken

I think it looks OK as it is now, we are just passing an API object here:

For Android, the EndpointMillicastSource object is simply being passed, similarly to Web, where unfortunately it's called ChannelMillicastSource, but the interface is the same.

@Yousif-CS @wjoosen @turbidwater could you check again?

I only just noticed we ended up exposing the millicastSrc on iOS too. I'll make the necessary changes