[automerger skipped] Cherry-pick "Support Python 3.9 in ACTS framework" to rvc-dev am: a39eeb59ec am: f782065b9f -s ours

am skip reason: Merged-In Iac396dd6fb6b38cbe3b96543956af57b466e85d5 with SHA-1 a39eeb59ec is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/tools/test/connectivity/+/15464706

Change-Id: If0381afb9969eb05c679b4553172d89644286a73
tree: 086860657ca87b22244b66d9ab992accc710f467
  1. acts/
  2. acts_tests/
  3. tools/
  4. wts-acts/
  5. Android.mk
  6. OWNERS
  7. PREUPLOAD.cfg