Add unittest to python 3.10 (Windows)

...taken from ab/9793539.

Bug: 267627790
Test: n/a
Change-Id: Iac104fcb884eb4101b0834eac8a54063a68ce443
13 files changed
tree: f3182dd7c2927b6657484db15a3db8ac600bcfed
  1. x64/
  2. .gitignore
  3. BUILD