Permanently enable rescind and visible notifications processing via NotificationService
Summary:
This differential removed codeVersion > 1000 condition so that visible notifications and rescinds processing is done in NotificationService.
IMPORTANT: I oblige myself to add suitable check against specific code version before landing. Ths code version in the check will be <current native code version + 2>.
Test Plan: Repeat test plan for the entire stack (excluding first differential) whthout the need to change anything in keyserver.
Reviewers: atul, kamil
Reviewed By: atul
Subscribers: ashoat, tomek
Differential Revision: https://phab.comm.dev/D6922