Yesterday, at Google I/O, the company announced Android M and teased us with a bunch of cool features. However, the company couldn’t mention everything in one keynote. However, Android M is available for download on some devices. Here are just some of the sweet features in the preview that Google didn’t announce. All the Important Stuff Google Announced at I/O 2015 All the Important Stuff Google Announced at I/O 2015 All the Important Stuff Googl…