There are a lot of things the fourth smartphone in Samsung’s halo Galaxy S series is not. It’s not a reinvention, or a revolution. If it were a movie, the Galaxy S 4 wouldn’t be the blockbuster revival of a flagging film franchise: the reboot that kicks a sagging series back into high gear. That’s because the Galaxy S line has never been a disappointing one. For years, Samsung’s flagship smartphone series has dominated the Android landscape, making the word “Galaxy” synonymous with Google’s platform in much of the public vernacular. Last ...