BEVERLY HILLS, Calif. — With “American Idol” poised to wave goodbye next year, Fox executives are doubling down on “Empire” hitmaker Lee Daniels.The network announced Thursday morning that it has ordered a Daniels drama pilot called “Star,” which looks at an aspiring girl group. But it won’t be simply “Empire, Part Two,” executives say.“Like ‘Empire,’ it’s set against the backdrop of the music business but from a very different perspective,” Fox TV Group Chairman and Chief Executive Dana Walden told reporters at the summer TV press tour in Beverly Hills.