Merge "Revert "Revert "Import external/python/jinja into master""" am: 29c64d99d4

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/python/jinja/+/12401642

Change-Id: Ia4f486d9941892db24ab3e36dc6f50fd50f5c24f