After a year of its user count shrinking or staying flat, Snapchat is finally growing again, and more growth is likely on the way. That’s because it’s finally completed the rollout of Project Mushroom, aka a backend overhaul of its Android app that’s 25 percent smaller and 20 percent faster. Designed for India and other emerging markets where iPhones are too expensive, Snapchat saw an immediate 6 percent increase in the number of people on low-end devices sending Snaps within the first week of upgrading to the new Android app.