android: switch stack.py to py3

Installing python-is-python2 is getting more and more annoying. With py3
the script worked on a trivial input.

Bug: None
Change-Id: I9e3b4008fb9bef1397b19dc1bab932e581d74843
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3540500
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Egor Pasko <pasko@chromium.org>
Cr-Commit-Position: refs/heads/main@{#983359}
NOKEYCHECK=True
GitOrigin-RevId: 566e2367dffa7126129109f20b79743b054dc4a8
2 files changed
tree: 9c1d87171eed00137790b9cc80fee8b18de4a279
  1. development/
  2. DIR_METADATA
  3. LICENSE
  4. OWNERS
  5. README.chromium