现调用微信SDK启动扫码，扫码完成之后释放资源WxPayFace.getInstance().releaseWxpayface(activity.getApplicationContext());
然后等待3S其他应用再去使用摄像头的时候提示摄像头被占用，导致无法使用摄像头

2020-03-31 13:16:02.929 6993-6993/com.demo.facedemo D/WxPayFace: onServiceConnected
2020-03-31 13:16:02.933 6993-6993/com.demo.facedemo E/WechatFaceUtil: response initWxpayface: [ {return_code=SUCCESS, return_msg=initWxpayface rsp} ] 
2020-03-31 13:16:02.933 6993-6993/com.demo.facedemo E/MainActivity: wechatFaceListener code:0, msg:开始扫码
2020-03-31 13:16:02.934 6993-6993/com.demo.facedemo D/WxPayFace: startCodeScanner
2020-03-31 13:16:08.929 6993-7005/com.demo.facedemo E/WechatFaceUtil: response startCodeScanner: [ {return_code=SUCCESS, code_msg=134924051078210495, return_msg=scan code success} ] 
2020-03-31 13:16:08.929 6993-7005/com.demo.facedemo E/MainActivity: wechatFaceListener scanCodeSuccess:134924051078210495
2020-03-31 13:16:08.929 6993-7005/com.demo.facedemo D/WxPayFace: releaseWxpayface
2020-03-31 13:16:14.976 6993-6993/com.demo.facedemo E/UniFaceUtil: 刷脸服务绑定成功
2020-03-31 13:16:15.206 6993-7005/com.demo.facedemo E/UniFaceUtil: 识别失败S:null, s1:Open camera failed : 打开相机失败:[-88] device busy