go.mobile/example/basic: respond to touch events
go.mobile/example/basic: respond to touch events

LGTM=nigeltao
R=nigeltao
CC=adg, bryanturley, davidday, golang-codereviews
https://golang.org/cl/139440043

swisspol/mobile,b54898533/mobile,0x90sled/mobile,steeve/mobile,b54898533/mobile,zach-klippenstein/mobile,ppamorim/mobile,lonphy23t/mobile,tempbottle/mobile,swisspol/mobile,grategames/mobile,grategames/mobile,xing/gomobile,golang/mobile,freeman0211/mobile,ppamorim/mobile,xing/gomobile,qskycolor/mobile,goldcaddy77/mobile,ppamorim/mobile,swisspol/mobile,tempbottle/mobile,samanalysis/mobile,b54898533/mobile,xing/gomobile,b54898533/mobile,goldcaddy77/mobile,ichu501/mobile,zach-klippenstein/mobile,golang/mobile,swisspol/mobile,samanalysis/mobile,cainiaocome/mobile,qskycolor/mobile,freeman0211/mobile,zach-klippenstein/mobile,freeman0211/mobile,cainiaocome/mobile,goldcaddy77/mobile,samanalysis/mobile,steeve/mobile,cainiaocome/mobile,cainiaocome/mobile,samanalysis/mobile,golang/mobile,swisspol/mobile,tempbottle/mobile,MaxCy330/mobile,lonphy23t/mobile,0x90sled/mobile,0x90sled/mobile,xing/gomobile,goldcaddy77/mobile,MaxCy330/mobile,tempbottle/mobile,grategames/mobile,DanielWorld/mobile,b54898533/mobile,freeman0211/mobile,lonphy23t/mobile,ppamorim/mobile,MaxCy330/mobile,xing/gomobile,ichu501/mobile,steeve/mobile,tempbottle/mobile,steeve/mobile,ichu501/mobile,lonphy23t/mobile,ichu501/mobile,ichu501/mobile,DanielWorld/mobile,qskycolor/mobile,qskycolor/mobile,golang/mobile,goldcaddy77/mobile,ppamorim/mobile,DanielWorld/mobile,lonphy23t/mobile,0x90sled/mobile,cainiaocome/mobile,MaxCy330/mobile,MaxCy330/mobile,DanielWorld/mobile,zach-klippenstein/mobile,0x90sled/mobile,samanalysis/mobile,grategames/mobile