Use Python 3.10 for local_mobly_runner.py

This is required due to Mobly packages being built with the Android
Python toolchain, which currently uses 3.10.

Bug: 286812616
Test: ./local_mobly_runner.py hello-world-tests (from user guide)
Change-Id: Ib5e8617f6070e6e70505a7ccc06a6921636a81ae
1 file changed
tree: a8fd89f6d9244f6b1dd20fabaf4655dad5d1edf3
  1. scripts/
  2. OWNERS
  3. README