Refactor android torchvision: not hardcoded mean/std (#26690)
Summary:
- Normalization mean and std specified as parameters instead of hardcode
- imageYUV420CenterCropToFloat32Tensor before this change worked only with square tensors (width==height) - added generalization to support width != height with all rotations and scalings
- javadocs
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26690
Differential Revision: D17556006
Pulled By: IvanKobzarev
fbshipit-source-id: 63f3321ea2e6b46ba5c34f9e92c48d116f7dc5ce
