Google is buying Fitbit for $2.1bn, in a move reminiscent of how the company acquired Motorola Mobility – and then a good chunk of HTC – in order to create the flagship devices that were needed to showcase Android at its best. However, unlike HTC, Fitbit doesn’t use the Android operating system, which presents something of a conundrum. While Google still owned Motorola (it later sold it on to Lenovo), the Moto 360 smartwatch was meant to be the direct rival to Apple’s Watch. But the market fragmented, as other Android Wear advocates emerged, and Samsung pressed ahead with its own Tizen platform. Then, the bottom fell out of the market anyway, massively driving down the prices for Android and…