Use Android “conversation” notification type

[specialfish9]

Feature Description

When receiving a notification from a messaging application like Fluffychat, it should be shown in the “Conversations” section of the notification panel.

Rationale

In this way not only we are in compliance with the Android notification standard, but also it is easier to not miss important messages.

Mockup

No response

Additional Context

https://developer.android.com/develop/ui/views/notifications/conversations

[krille-chan]

I would really like to do this, but flutter_local_notifications doesn't seem to support it. I only found this issue: https://github.com/MaikuB/flutter_local_notifications/issues/1419

[LFd3v]

It looks like a dupe of #515 too.

[krille-chan]

I think I found the trick how to implement it

[specialfish9]

Any update on this?

[88572]

For me, it shows and handles the notifications as a conversation after I manually set it, except it doesn't have bubbles.