Call of Duty, the popular first-person shooter video game franchise, is coming to Android and iOS. Fans can preregister online now, and Android users can also preregister in the Google Play Store. The app and any future updates are free, according to the game's website. In an email, a spokesperson for Activation said there will be a beta this summer in select regions. When fans preregister, they can opt to receive updates about the game, including when the beta launches. While the Google direct …