Replace distutils.cmd.Command with setuptools.Command.

`distutils` has long been deprecated in favor of `setuptools`. This change
simply replaces its use with an equivalent one from `setuptools`.

PiperOrigin-RevId: 546298482

setup.py

@@ -14,7 +14,6 @@
 
 """Simple package definition for using with `pip`."""
 
-from distutils import cmd
 import os
 
 import pkg_resources
@@ -45,7 +44,7 @@
 ]
 
 
-class _GenerateProtoFiles(cmd.Command):
+class _GenerateProtoFiles(setuptools.Command):
   """Command to generate protobuf bindings for AndroidEnv protos."""
 
   descriptions = 'Generates Python protobuf bindings for AndroidEnv protos.'