[web] Introduce deviceID parameter to initial notif message function

Summary:
Similar to D10660 but for web.

Depends on D10660

Test Plan: Check if encrypted notifs work on web.

Reviewers: varun, marcin, kamil

Reviewed By: varun, marcin, kamil

Subscribers: kamil, ashoat

Differential Revision: https://phab.comm.dev/D10662