TRCL-3698 Add user property tracking for push notification

[ruixhuang]

Had to move around the code a bit due to the initialization sequence of Tracking.shared and NotificationService.share.

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Refactoring or Technical Debt
• [ ] Documentation update
• [ ] Other (please describe: )

[linear[bot]]

TRCL-3698 Add event logging to push notification settings