Summary:
Hooked up metadata to the stream inteceptor, enhanced error handling to deal with:
1. Recording subsequent metadata messaages that came in while in error state such that all of them are processed
2. Recording any frames that came in while in error state such that after recovering from error we have the latest state
3. Splitting out recoverable and non recoverable errors more explicitly
Reviewed By: lblasa
Differential Revision: D45079137
fbshipit-source-id: 67a2ffef72d94d2b1492f201a2228659720e306b
c96535e15f