I don't even know if the android dolphin is even being worked on right now, graphical glitches with s6 making you have to downgrade for a fix, s7 Exynos having issues as well, no touchscreen support for wii. It's all a mess!
But what I'm trying to say is, the PS4 controller support is messed up, going down with the analog stick also responds to Z. Some other controls are upside down even though they all can map. This could easily be fixed if someone just bothered to add wii touchscreen support to android so I don't have to even walk around with a controller just to play a wii remote only game...