Fix warnings spotted in prototype datasets tests (#4668)

* fix category file inclusion

* fix deprecated import

setup.py

@@ -466,7 +466,7 @@ if __name__ == "__main__":
         license="BSD",
         # Package info
         packages=find_packages(exclude=("test",)),
-        package_data={package_name: ["*.dll", "*.dylib", "*.so", "*.categories"]},
+        package_data={package_name: ["*.dll", "*.dylib", "*.so", "prototype/datasets/_builtin/*.categories"]},
         zip_safe=False,
         install_requires=requirements,
         extras_require={

torchvision/prototype/datasets/utils/_dataset.py

@@ -5,7 +5,7 @@ import os
 import pathlib
 import textwrap
 import warnings
-from collections import Mapping
+from collections.abc import Mapping
 from typing import (
     Any,
     Callable,