example/audio: use the latest config.Event in arranger func.
example/audio: use the latest config.Event in arranger func.

Change-Id: I452e9e7e37a983421acac23ab265b822fbc3db19
Reviewed-on: https://go-review.googlesource.com/12339
Reviewed-by: David Crawshaw <a2f0bf29257797dd66800b4fbb9945c3e216c004@golang.org>

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