Move Python script from distutils to shutil

Bug: 254537505
Test: google-java-format-diff.py -h
Test: google-java-format-diff.py # force to reach modified line
Change-Id: I7b8e85e0dbf959808dc1b5c35df06d5b3b626a1f
(cherry picked from commit 7b698a97feca390c8be2fa815fe06ef1e9e8c4a5)
Merged-In: I7b8e85e0dbf959808dc1b5c35df06d5b3b626a1f
1 file changed