Missing StubTypeParameters (e.g. promote/demote)

[piLovr]

Disclamer:

I get that stubTypes are a work in progress, a lot of Type handling is missing (which is totally fine). this is just about the stubParameters in addMessageForGroupStubType (of StreamHandler, Line 692), which calls onMessage.

Issue:

promote/demote nodes have "grandchildren" with the affected jid's. Those are present in the node itself, but sadly not in the ChatMessageInfo, since getStubTypeParameters() (of StreamHandler, Line 742) only parses the direct children and does not act recursevly.

I wasn't sure if this was worth opening a pull request, since I don't know (yet) if recursive implementation might break other things.

exampleNode.json