Create the first stem_cconv network and change the image size to 112 112 24.
If it is 0, use FusedMBConv. If it is 1, use MBConv. The following place is wrong. If i==0, the input uses the last input, and if it is not 0, the output channel is used. These are specific uses for the first pass.
The function of expand_conv is to expand the number of channels, and then use project_conv to reduce the number of channels. When there is no shortcut, there is no droppath operation,
