Remove threadID to notifID mapping from redux and all related usages

Summary: This differential removes threadID to NotifID mapping from redux on native.

Test Plan: Test plan for previous differential + ensure flow does not complain.

Reviewers: tomek, atul, ashoat

Reviewed By: tomek, ashoat

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D6229