SERIES PREMIERE: Not many people get to launch seasons of two different shows in as many days. Yesterday, Jennifer Lopez helped preside over the final season of Fox’s American Idol, and tonight she stars in a new police drama series, Shades of Blue, playing a cop whose conflicted career and home life unfurls in flashback over the course of a season. For Lopez fans, it’s a three-hour J-Lo fest: two hours of American Idol, followed by this. But for general police drama fans, it’s not so special…