In both music and manner, Quincy Jones has always registered — from afar, anyway — as smooth, sophisticated, and impeccably well-connected. (That’s what earning 28 Grammy awards and co-producing Michael Jackson’s biggest-selling albums will do.) But in person, the 84-year-old music-industry macher is far spikier and more complicated. “All I’ve ever done is tell the truth,” says Jones, seated on…