Select helmet type for AI

[Gunfreak]

1. At minimum make the flight use the same helmet that you use. I was flying with NVGs but my wingman was using JHMCS

2. Ideally you should be able to select helmet type for all F16 AI. So you don't have AI flying with JHMCS in 1994 missions. And since many F16s didn't use NVGs well into the 90s. It would be nice to make sure they don't use that either in historic missions