(Reuters) - Qualcomm Inc forecast current-quarter profit above Wall Street expectations and beat estimates for fourth-quarter revenue from its closely watched licensing business, sending its shares up 5% in extended trading.The world's biggest supplier of mobile phone chips expects between 1.75 billion and 1.85 billion smart devices with modem chips, including 175 million to 225 million 5G handsets, to be sold in 2020. As Qualcomm collects license fees on devices that use cellular connections..