PASADENA, Calif.   Both Fox and Ryan Seacrest say they want Seacrest to stay as host of "American Idol" after this year. Whether that will happen was unclear Sunday even as both sides promoted this month's launch of the 11th season of the country's most popular television show."It's a tough negotiation and one that will come to conclusion, I think, pretty quickly," Fox Entertainment President Kevin Reilly said.Seacrest is not