quote on why this isn't enabled in the main repo from cgutman
Yep, this is actually already implemented but disabled. The problem preventing us from shipping it on Android is that full native multi-touch interferes with the ability to launch the virtual keyboard using the 3-finger tap combo. We need to implement some kind of overlay or something to allow activation of the keyboard before we can turn it on. We should also probably add some type of zoom feature since touch targets can be very tiny on a phone/tablet screen.
This wasn't an issue with the PC client because it never had virtual keyboard support.
all I did was uncomment the lines that disabled this feature, as stated above this interferes with the ability to use the virtual keyboard so don't use it if you need that
make sure to enable absolute touch in moonlight's settings or this won't work