[lib] Create user infos for new user ids

Summary:
issue: ENG-7744
When user ids are extracted from server messages, we first want to create UserInfos with only id. Then, UserInfosHandler will fetch missing data

Test Plan: Dispatched the action and checked that entries are created for provided ids

Reviewers: tomek, kamil

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D12216