Just wanted to let people know that I installed the latest Dolphin emulator build last night and I was surprised to notice it had controller bindings built in. For those unaware, you used to have to install an old version, configure your controller, then update and hope you did it right.
Yes it has been implemented for about 2 months. I posted a while back.
https://www.reddit.com/r/EmulationOnAndroid/comments/5fdpyw/dolphin_input_bindings_are_back/?st=IYG57IIL&sh=da7e2c80
Works well for me to a point. I have not been able to get games running without audio issues. FPS is also not much better than 50 fps in Double Dash.