Technology giants Google and Apple are about to expand their battle for digital supremacy to a new front: the automobile. Next week at the Consumer Electronics Show in Las Vegas, Google and German auto maker Audi AG plan to announce that they are working together to develop in-car entertainment and information systems that are based on Google’s Android software, people familiar with the matter said. They also plan to disclose collaborative efforts with other automotive and tech companies, including chip maker Nvidia, to establish Android as an important technology for future vehicles, these people said. The aim is to allow drivers and passengers to access music, navigation, apps and services that are similar to those widely available now on Android-powered smartphones, these people added.