Use unique touch mouse class for iOS and Android.
Enable touch mouse for arcade lightgun games or when maple device A is a
lg. Disable it otherwise.
android: only display controllers that actually send events, including
system mouse and keyboard. Use separate Touch Mouse and System Mouse.
iOS: fix missing button input for touch mouse. Don't bubble up touch
events that hit vgampad buttons or controls.
Refactor common virtual gamepad code.
Distinct layouts for console and arcade.
Add arcade buttons 5 and 6, insert card button, service mode toggle.
System SP support
Flyinghead