Google has tried a few (mostly unsuccessful) strategies to get Android device makers updating their software in a timely fashion. Remember the short-lived Android Update Alliance? However, it might be trying something different: embarrassing those vendors into doing something. Bloomberg tipsters claim that Google has created lists that rank Android manufacturers based on the timeliness of their updates. They're private right now, but the company is considering making them public to shame vendors that drag their heels -- it's hoping those brands too sluggish to make the lists will strive to do better.