update-art-module-prebuilts.py: update to python3 am: 15826e543c am: cae85d01dc am: 610b561ae7

Original change: https://android-review.googlesource.com/c/platform/packages/modules/ArtPrebuilt/+/1683878

Change-Id: I1cc847b8293ecdc7d5d22d7a200b42eb0ea2bf9a