Rumors are flying that Google has picked HTC to make its next tablet, the Nexus 9, even though the Taiwanese firm swore off tablets after its ill-fated Flyer launch in 2011. The purported device, codenamed Volantis by HTC, has apparently been the focus of a collaboration between the two firms, which has seen the OEM’s engineers regularly flying to the Google campus to work with their counterparts there. While neither side has confirmed the rumors, it is known that the Nexus 9 tablet exists thanks to documents filed in a court case between Nvidia and Qualcomm/Samsung, which confirm that the device will be using Nvidia’s Tegra K1 processor and that it is expected in Q3 2014. That shows Google keeping…