* [PM-17563] Implement listenForTaskNotifications in default-task.service.ts
* [PM-17563] Update syncService to include userId in syncCompleted message payload
* [PM-17563] Update default-task.service to react to both pending task notifications and completed syncs
* [PM-17563] Add unit tests around task notification listening
* [PM-17563] Only check for at risk password tasks if tasks are enabled
* [PM-17563] Make userId required even if undefined
* [PM-17563] Use abstract TaskService instead of default implementation in MainBackground
* [PM-17563] Cleanup userId filtering
* [PM-17563] Remove references to Angular from TaskService
* [PM-17563] Move Task module to libs/common/vault to avoid Angular dependency
* [PM-17563] Fix bad imports
* [PM-17563] Fix a few more missed imports
