Clone in shm requests with all headers parsed.

For the UAC transactions, when adding the fake msg in the UAS side, be sure all the needed headers are parsed and ready for cloning into SHM.

Reported by Nick Altmann. Also many thanks for the support with the troubleshooting.

(cherry picked from commit 5669370f6492ec0c6a01bb31db791c6f7dfc7885)