wayland: rename internal touch management functions
wayland: rename internal touch management functions

These functions arent quite related to the device manager, so rename these
more conveniently.

https://bugzilla.gnome.org/show_bug.cgi?id=734374

ahodesuka/gtk,davidgumberg/gtk,chergert/gtk,alexlarsson/gtk,grubersjoe/adwaita,grubersjoe/adwaita,ahodesuka/gtk,Adamovskiy/gtk,grubersjoe/adwaita,Adamovskiy/gtk,Adamovskiy/gtk,ahodesuka/gtk,ahodesuka/gtk,chergert/gtk,Lyude/gtk-,jigpu/gtk,davidgumberg/gtk,jessevdk/gtk,grubersjoe/adwaita,davidgumberg/gtk,Lyude/gtk-,jessevdk/gtk,jadahl/gtk,jadahl/gtk,jigpu/gtk,chergert/gtk,jigpu/gtk,grubersjoe/adwaita,chergert/gtk,jadahl/gtk,grubersjoe/adwaita,Lyude/gtk-,alexlarsson/gtk,Adamovskiy/gtk,jigpu/gtk,Lyude/gtk-,jadahl/gtk,davidgumberg/gtk,jessevdk/gtk,jigpu/gtk,Lyude/gtk-,chergert/gtk,jessevdk/gtk,jadahl/gtk,Lyude/gtk-,davidgumberg/gtk,Adamovskiy/gtk,Adamovskiy/gtk,ahodesuka/gtk,Lyude/gtk-,grubersjoe/adwaita,ahodesuka/gtk,davidgumberg/gtk,ahodesuka/gtk,jadahl/gtk,alexlarsson/gtk,Adamovskiy/gtk,chergert/gtk,davidgumberg/gtk,alexlarsson/gtk,jessevdk/gtk,Lyude/gtk-,grubersjoe/adwaita,alexlarsson/gtk,jigpu/gtk,davidgumberg/gtk,jadahl/gtk,jessevdk/gtk,alexlarsson/gtk,alexlarsson/gtk,jadahl/gtk,chergert/gtk,ahodesuka/gtk,jigpu/gtk,alexlarsson/gtk,jigpu/gtk,Adamovskiy/gtk,jessevdk/gtk,chergert/gtk