Google is preparing to change how apps reach Android users, and this time the focus is not just on the Play Store. Starting next year, the company will require every developer to go through an identity check, even those who publish their apps through sideloading or third-party stores. It doesn’t mean sideloading is going away. Android will stay open, at least in the sense that apps can still be installed outside Google’s marketplace. But the days when someone could release software anonym...