Add Channel (#7442)
Add Channel (#7442)

* add Channle

* refine Channel

PaddlePaddle/Paddle,luotao1/Paddle,chengduoZH/Paddle,PaddlePaddle/Paddle,pkuyym/Paddle,chengduoZH/Paddle,pkuyym/Paddle,reyoung/Paddle,putcn/Paddle,tensor-tang/Paddle,Canpio/Paddle,putcn/Paddle,jacquesqiao/Paddle,luotao1/Paddle,baidu/Paddle,putcn/Paddle,baidu/Paddle,QiJune/Paddle,jacquesqiao/Paddle,jacquesqiao/Paddle,pkuyym/Paddle,pkuyym/Paddle,lcy-seso/Paddle,putcn/Paddle,QiJune/Paddle,reyoung/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,jacquesqiao/Paddle,tensor-tang/Paddle,chengduoZH/Paddle,putcn/Paddle,lcy-seso/Paddle,baidu/Paddle,lcy-seso/Paddle,lcy-seso/Paddle,luotao1/Paddle,Canpio/Paddle,QiJune/Paddle,putcn/Paddle,PaddlePaddle/Paddle,jacquesqiao/Paddle,luotao1/Paddle,Canpio/Paddle,reyoung/Paddle,luotao1/Paddle,QiJune/Paddle,QiJune/Paddle,lcy-seso/Paddle,pkuyym/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,tensor-tang/Paddle,reyoung/Paddle,Canpio/Paddle,baidu/Paddle,QiJune/Paddle,reyoung/Paddle,reyoung/Paddle,luotao1/Paddle,lcy-seso/Paddle,Canpio/Paddle,chengduoZH/Paddle,tensor-tang/Paddle,Canpio/Paddle,luotao1/Paddle,pkuyym/Paddle,PaddlePaddle/Paddle,jacquesqiao/Paddle,PaddlePaddle/Paddle,baidu/Paddle,chengduoZH/Paddle,tensor-tang/Paddle