Add settings and heartbeats to stream

[Gold872]

There's scenarios where you might want to listen to the incoming heartbeats or settings updates. For example, in the dashboard it listens to incoming UpdateSetting messages for changing modes.

Since these messages are never added to the stream, certain handshakes will never be completed since they are never added to the stream.

This is the fix for it.

[Levi-Lesches]

I wanna see how long I can push this off because Salaj and Daniel are working on rewriting WrappedMessage in a more general way that can handle more of these special cases automatically.