Proximity Alerts

Hear about faster approaching cars:
- Player exiting pits: Hear if you'll rendesvouz with opponents
- Opponents exiting pits: Hear if you'll reach the merge point at the same time
- Player offtrack: Hear when you can rejoin the track, DRE will mention the number of cars and when to go
- Opponents closing in from behind: Improved Blue flag detection - hear only about those who are truly faster than you and ignore the rest