Samsung isn't stupid, despite all of the litigating going on, Apple is a HUGE customer of Samsungs. That would be suicide to separate from Apple.
Samsung can easily survive without Apple but would be less profitable. Not the other way around. Apple is 9% of Samsung's revenue. However, Samsung is integral to almost all Apple hardware.
That's why I'm surprised to see Apple playing with fire over the phone issue rather than trying to set license terms and nickel and diming over Samsung's patents while demanding all profits on Apple's. At some point Samsung will release a good selling phone that has far less in common with the iPhone and selling comparably (Think: Galaxy SIII) and then decide to just not renew contracts with Apple instead opting to sell those parts themselves rather than increase productivity. If Samsung gets another manufacturer or can sell the parts themselves, they might jump ship if Apple is trying to dump them. If Apple isn't trying to dump Samsung, then it makes no sense for Samsung to figure out how to lower the cost of its devices in such a way.