android camera2

开双镜头
https://www.freesion.com/article/2842864702/

https://www.jianshu.com/p/1a0f43813433
https://www.jianshu.com/p/0ea5e201260f
https://www.cnblogs.com/Jackie-zhang/p/10084947.html

https://github.com/yocn/AndroidMediaCodec/blob/master/app/src/main/java/com/yocn/meida/util/CameraUtil.java