Huawei has grand plans for its HarmonyOS smartphone software, planning to have the new operating system running on 300m devices by the end of 2021. That figure would be reached by selling 100m new devices with native support, and upgrading the rest from Android. The target was announced at last week’s Huawei global analyst summit and it was clear that, like Android, HarmonyOS would be a multi-device platform, also targeting smart TVs, IoT devices and potentially cars. This will be important at a time when Huawei’s smartphone shipments are falling, because of international restrictions but also loss of market share in China to other local rivals such as Oppo and Xiaomi. HarmonyOS was hastily brought off the back burner when…