NEW YORK—For the first time in three decades, the U.S. has a new favorite dog breed, according to the American Kennel Club. Adorable in some eyes, deplorable in others, the sturdy, push-faced, perky-eared, world-weary-looking, and distinctively droll French bulldog became the nation’s most prevalent purebred dog last year, the club announced Wednesday. Frenchies ousted Labrador…