Google TV is becoming more like basic cable. The company announced today it’s adding content from several new providers to make browsing ad-supported live TV channels a central part of the platform. The news comes several months after the company was reportedly negotiating with media companies to add similar content to YouTube.Starting today, Google TV is adding Free Ad-Supported Streaming Television (FAST) channels from Tubi, Plex and Haystack News to its existing FAST content from Pluto TV. In addition, Google is adding “built-in channels from Google TV that you can watch without even downloading or launching an app.” The company says the service now aggregates over 800 free channels.FAST is the industry term for ad-supported “linear streaming content,” meaning it’s broadcast at specific times like traditional television. (Think standard afternoon programming on TNT or TBS.) Already embraced by competitors like Roku, FAST channels turn streaming into an experience akin to