Support "channel_id" in HTML5 notifications on Android

Hello ! :slight_smile:

I would love to see support for FCM’s “channel_id” field in html5 notifications.
It would allow to have different types of notifications for certain items. For example : being able to configure different sounds for different notifications (ie: “ding” for the doorbell ring notification).

FCM documentation here : https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages#androidnotification

Thanks in advance for your consideration !
Cheers !