Introduce threadID to iOS rescind notification to enable easy SQLite update. Introduce setUnreadStatus flag to control whether to update SQLite in response to rescind

Summary: This diff introduces a flag to control whether we want to update thread unread status in persisted storage in reponse to notif rescind. Additionally it introduces threadID to iOS rescind, since we will need that in further diffs thath update unread status.

Test Plan: No test plan. Further differentials will use thos features and provide appropriate test plans.

Reviewers: palys-swm

Reviewed By: palys-swm

Subscribers: ashoat, Adrian, atul, yayabosh

Differential Revision: https://phab.comm.dev/D4231