run-test: Convert from bash to python. am: d5f69e241e am: d6ef626cd8 am: 1e457398be

Original change: https://android-review.googlesource.com/c/platform/art/+/2239595

Change-Id: I60426999d5c53c02dbc64c0dc93a80afb6a27f9f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>