Added MediaStreamTrack::Stop to constraints demo
Added MediaStreamTrack::Stop to constraints demo

virajs/testrtc,webrtc/apprtc,harme199497/adapter,virajs/samples,samdutton/apprtc,webrtc/samples,82488059/apprtc,TheKnarf/apprtc,bemasc/samples,YouthAndra/apprtc,YouthAndra/apprtc,TribeMedia/samples,webrtc/testrtc,procandi/samples,martin7890/samples,arnauorriols/apprtc,taylor-b/samples,TribeMedia/testrtc,oliverhuangchao/samples,fippo/apprtc,calebboyd/adapter,virajs/testrtc,leehz/samples,82488059/apprtc,TheKnarf/apprtc,smayoorans/samples,xdumaine/adapter,dengshaodong/docker-apprtc,aadebuger/docker-apprtc,samdutton/webrtc,smayoorans/samples,TribeMedia/testrtc,virajs/apprtc,oliverhuangchao/samples,dengshaodong/docker-apprtc,virajs/testrtc,webrtc/adapter,juberti/samples,b-cuts/samples,shelsonjava/apprtc,smbale/samples,guoweis/webrtc,fippo/apprtc,shelsonjava/testrtc,martin7890/samples,Roarz/samples,webrtc/apprtc,todotobe1/samples,jessetane/testrtc,overtakermtg/samples,jessetane/testrtc,todotobe1/apprtc,virajs/apprtc,smadhusu/AppRTC,guoweis/webrtc,JiYou/apprtc,mulyoved/samples,4lejandrito/adapter,82488059/apprtc,taylor-b/samples,mvenkatesh431/apprtc,shelsonjava/samples,procandi/apprtc,Zauberstuhl/adapter,kosmosby/Google-WebRTC-Samples,mulyoved/samples,ralic/testrtc,procandi/samples,calebboyd/adapter,askdaddy/samples,jiayliu/apprtc,virajs/apprtc,shines/adapter,overtakermtg/samples,Acidburn0zzz/adapter,procandi/apprtc,JiYou/apprtc,shelsonjava/apprtc,fippo/apprtc,jessetane/testrtc,webrtc/apprtc,jjrasche/cell-based-RC-control,ralic/testrtc,martin7890/samples,juberti/samples,kod3r/samples,YouthAndra/apprtc,sarandogou/webrtc,shelsonjava/apprtc,mvenkatesh431/apprtc,bemasc/samples,volkanh/volkanh.github.io,shaohung001/samples,Edward-Shawn/samples,todotobe1/apprtc,aadebuger/docker-apprtc,dengshaodong/docker-apprtc,ralic/samples,ralic/samples,JiYou/apprtc,smadhusu/AppRTC,YouthAndra/apprtc,Edward-Shawn/samples,akashrchoksi/newone,askdaddy/samples,tsruban/samples,procandi/apprtc,procandi/apprtc,procandi/apprtc,samdutton/apprtc,MahmoudFouad/samples,fitraditya/samples,xdumaine/samples,fetterov/samples,tsruban/samples,shaohung001/samples,arnauorriols/apprtc,harme199497/adapter,bpyoung92/apprtc,82488059/apprtc,leehz/samples,shelsonjava/samples,bpyoung92/apprtc,pquochoang/samples,dengshaodong/docker-apprtc,TribeMedia/apprtc,pquochoang/samples,TribeMedia/apprtc,smbale/samples,jarl-alejandro/apprtc,mvenkatesh431/samples,xdumaine/samples,todotobe1/apprtc,harme199497/adapter,mauricionr/samples,EmreAkkoyun/sample,bbandaru/samples,mvenkatesh431/apprtc,diddie06/webrtc,jarl-alejandro/apprtc,ralic/samples,ralic/testrtc,shelsonjava/apprtc,aadebuger/docker-apprtc,jiayliu/apprtc,Acidburn0zzz/adapter,webrtc/adapter,myself659/samples,myself659/samples,shelsonjava/samples,bpyoung92/apprtc,arnauorriols/apprtc,knightsofaa/webrtc,TheKnarf/apprtc,jjrasche/cell-based-RC-control,TribeMedia/apprtc,bpyoung92/apprtc,calebboyd/adapter,jarl-alejandro/apprtc,xdumaine/adapter,mvenkatesh431/apprtc,Zauberstuhl/adapter,mvenkatesh431/samples,dushmis/webrtc,jiayliu/apprtc,aadebuger/docker-apprtc,xdumaine/samples,arnauorriols/apprtc,shelsonjava/testrtc,procandi/samples,jjrasche/cell-based-RC-control,Roarz/samples,smbale/samples,jarl-alejandro/apprtc,todotobe1/apprtc,MahmoudFouad/samples,pquochoang/samples,dengshaodong/docker-apprtc,Temasys/Google-WebRTC-Samples,YouthAndra/apprtc,TheKnarf/apprtc,ralic/testrtc,akashrchoksi/newone,dushmis/webrtc,kod3r/samples,bbandaru/samples,kod3r/samples,fetterov/samples,keshwans/samples,keshwans/samples,jan-ivar/samples,akashrchoksi/newone,samdutton/webrtc,rajsek/webrtc,myself659/samples,mulyoved/samples,leehz/samples,arnauorriols/apprtc,4lejandrito/adapter,Roarz/samples,Temasys/Google-WebRTC-Samples,bbandaru/samples,JiYou/apprtc,jiayliu/apprtc,TribeMedia/apprtc,JiYou/apprtc,smadhusu/AppRTC,jan-ivar/adapter,samdutton/apprtc,bemasc/samples,overtakermtg/samples,todotobe1/samples,TribeMedia/samples,bpyoung92/apprtc,shelsonjava/testrtc,smadhusu/AppRTC,jiayliu/apprtc,shelsonjava/apprtc,samdutton/apprtc,knightsofaa/webrtc,virajs/samples,webrtc/samples,shelsonjava/testrtc,fitraditya/samples,mauricionr/samples,b-cuts/samples,TribeMedia/samples,dajise/samples,virajs/testrtc,diddie06/webrtc,todotobe1/apprtc,shines/adapter,smayoorans/samples,volkanh/volkanh.github.io,fippo/webrtc,b-cuts/samples,jan-ivar/adapter,Acidburn0zzz/adapter,volkanh/volkanh.github.io,TribeMedia/testrtc,fippo/apprtc,fitraditya/samples,Zauberstuhl/adapter,tsruban/samples,fippo/apprtc,dajise/samples,fippo/webrtc,mvenkatesh431/apprtc,EmreAkkoyun/sample,mvenkatesh431/samples,TribeMedia/apprtc,mauricionr/samples,Edward-Shawn/samples,TheKnarf/apprtc,virajs/apprtc,smadhusu/AppRTC,aadebuger/docker-apprtc,shines/adapter,jarl-alejandro/apprtc,4lejandrito/adapter,guoweis/webrtc,virajs/apprtc,82488059/apprtc,samdutton/apprtc,oliverhuangchao/samples,fetterov/samples,jjrasche/cell-based-RC-control,virajs/samples,EmreAkkoyun/sample,dajise/samples,jan-ivar/samples,webrtc/testrtc,webrtc/apprtc,MahmoudFouad/samples,todotobe1/samples,TribeMedia/testrtc,webrtc/apprtc,jessetane/testrtc