Replace all torch.jit.annotations with typing annotations

[datumbox]

🚀 Feature

The use of torch.jit.annotations was necessary to be compatible with Python 2, nevertheless now we only support Python 3. Thus we should replace all torch.jit.annotations with typing annotations.

Examples:

vision/torchvision/transforms/autoaugment.py

Line 6 in 83171d6

from torch.jit.annotations import List, Tuple

vision/torchvision/transforms/functional.py

Line 12 in 83171d6

from torch.jit.annotations import List, Tuple

There are more cases across the code-base. We should replace as many as possible.

[zhiqwang]

Hi @datumbox , I submitted a PR to fix this issue.