I think I can independently confirm no go on Android 4.4
Sprint put out the 4.4.2 update for HTC One so I got an OTG cable to try. I get the "Android 4.2/4.3 has disabled the hotwire"
but I was hopeful because when I plugged in the hotwire it asked if I wanted to connect to this USB device. My phone powers the hotwire and powers my RS Gen 2 when I plug it in (lights flash) but it won't read or apply settings to the ESC. bummer.