Most likely they did not foam the runway account the airplane still had all gear down and locked (even though the nose was cocked) with all gear down you've got your brakes and thrust reversers, foam would be bad for braking and might flame out your engines no engines no thrust reversers, foam bad in this scenario.They stopped nearly at the end of the 10,000 foot runway.
Methinks they used very little if any brakes (I think just a little differential braking to stay on centerline). And a smart thing, considering any forward weight transfer might cause the nose gear to dig in and collapse. The foam wouldn't have caused a flameout-- the nosewheel wouldn't have thrown up enough for the engines to injest causing a flameout, and the main gear is positioned behind the engine intakes.
Spoilers help reduce the rollout distance and were not affected.
The nose gear could not dig in and collapse once it was down and locked, it rotates aft. Take a close look at the nose gear pictures and you might see what I'm talking about.
If there is foam on the runway the engines will suck it up fine even without the help of a nose gear.
Anyway a happy ending for the crew and passengers.
Wolf