[native] Navigate to the role change screen

Summary:
This is a smaller code change, but only involves adding the navigation aspect to go from the members list to the role change screen.

Depends on D8156

Test Plan: Confirm that the navigation works

Reviewers: atul, ginsu

Reviewed By: atul

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D8157