add secOCKey to carParams

[pd0wm]

Probably useful to ensure routes can be used in process replay. Can also be fetched from initData if you don't want it in the carParams.

[adeebshihadeh]

I don't think we want to log the keys at all. Any reason to besides offline tools/debugging?

[pd0wm]

Without logging the key something like process replay wouldn’t work on SecOC routes. It will use the key to verify messages from the car, and throw an alert/not engage if you’re using the wrong key.

[haraschax]

This is just a msgq library now