While widely believe that mobile advertising is a Facebook-Google duopoly, AppsFlyer is hustling to impact the industry in its own unique way. The Israel-based startup, which has an office located at WeWork in Midtown Manhattan, is known for its innovations in mobile attribution and marketing analytics. With an infusion of capital — $56 million received this week — AppsFlyer is hoping to bolster its services and provide companies like Bloomingdale’s and HBO with in-depth data on their mobile…