Add Support Adjusting On Screen Controls

[daddecima]

On screen Controls are way uncomfortable to play, if possible to be able to adjust on screen the HUD would be great, also if possible to play with touch screen like to be able to move around the camera with the finger and not the joystick, also for moving around like mobile games

[xyaoo]

Now the on-screen control is too uncomfortable, wish we could use the on-screen control and touch screen like mobile games, or there is an option to freely combine on-screen control and touchpad or touch screen

[TrueZhuangJia]

check my repo, https://github.com/Moonlight-the-Fried-Fish/moonlight-ios-NativeMultiTouchPassthrough