Google is building a "home-entertainment system that streams music wirelessly throughout the home and would be marketed under the company's own brand," according to a report today in the Wall Street Journal. While the move has not been confirmed by Google, it would build upon the Google Music streaming service and music store. It would also likely integrate with Android—the Journal describes it in one paragraph as the "Google Android entertainment system," and says it is being developed by Google's Android unit for unveiling later this year. The system "would let people download digital…

