Update input type of useChangeThreadSettings

Summary: This differential updates input type of useChangeThreadSettings to accept union of thin and thick thread specific data.

Test Plan: test that changing various thread settings works for both thin and thick threads and results in the right notif.

Reviewers: tomek, kamil

Reviewed By: tomek, kamil

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D13287