[lib] Narrow LogIn[Response/Result] to MinimallyEncodedRawThreadInfos

Summary:
Followup to D10588. This is the first step in removing the invariant inside the

action.type === logInActionTypes.success ||
action.type === siweAuthActionTypes.success ||
action.type === registerActionTypes.success ||
action.type === fullStateSyncActionType

condition.

Depends on D10588

Test Plan: N/A, trusting flow

Reviewers: ashoat, ginsu, tomek

Reviewed By: ashoat

Differential Revision: https://phab.comm.dev/D10606