Support preventDefault() on touch (#3693)
Support preventDefault() on touch (#3693)

* Support preventDefault() on touch

Expose setting to enable mouse handlers on touch-only devices

Fixes #3567

* remove experimental setting to disable touch-only detection

MartinsThiago/polymer,gronke/polymer,ktiedt/polymer,JeremybellEU/polymer,ktiedt/polymer,yforrest/polymer,yforrest/polymer,JeremybellEU/polymer,jordanyaker/polymer,JeremybellEU/polymer,mgiuffrida/polymer,jordanyaker/polymer,yforrest/polymer,ikeagold/polymer,jordanyaker/polymer,mgiuffrida/polymer,Polymer/polymer,gronke/polymer,MartinsThiago/polymer,Polymer/polymer,ktiedt/polymer,mgiuffrida/polymer,MartinsThiago/polymer,ikeagold/polymer,gronke/polymer,ikeagold/polymer,Polymer/polymer