Duh, I see the problem now. Waze is only supported on iOS. In fact, according to this link, neither Spotify nor Waze look like they're supported on Android (!), which are precisely the apps I spent two hours trying to get working yesterday. I have an iPhone so it's not completely useless to us, but this is my wife's car.
Are you doing this only via BT, or hard wired? AFAIK, these only work over the USB connection.