Remove python2 from atest bazel am: 424c772c0a

Original change: https://android-review.googlesource.com/c/platform/tools/asuite/+/3336353

Change-Id: Iecdcc991b5172b06cd8b43ac0815e6d2b9c0164d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>