added nn.RecordBytesDecoder with its test

[Kevin-XiongC]

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[duchengyao]

可能需要移到functor。不太确定，帮你加另一个reviewer

[github-actions]

CI failed, removing label automerge

[github-actions]

Speed stats:

GPU Name: GeForce GTX 1080 

PyTorch resnet50 time: 141.9ms (= 7096.8ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 126.8ms (= 6337.6ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
Relative speed: 1.12 (= 141.9ms / 126.8ms)

PyTorch resnet50 time: 84.5ms (= 4225.2ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 73.9ms (= 3694.1ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
Relative speed: 1.14 (= 84.5ms / 73.9ms)

PyTorch resnet50 time: 58.4ms (= 2921.9ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 49.3ms (= 2465.2ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
Relative speed: 1.19 (= 58.4ms / 49.3ms)

PyTorch resnet50 time: 49.2ms (= 2460.2ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 41.9ms (= 2096.1ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
Relative speed: 1.17 (= 49.2ms / 41.9ms)

PyTorch resnet50 time: 43.5ms (= 2175.8ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 42.7ms (= 2135.8ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
Relative speed: 1.02 (= 43.5ms / 42.7ms)