gh-116622: Add Android test script (GH-121595)
Adds a script for running the test suite on Android emulator devices. Starting
with a fresh install of the Android Commandline tools; the script manages
installing other requirements, starting the emulator (if required), and
retrieving results from that emulator.
(cherry picked from commit f84cce6f25)
Co-authored-by: Malcolm Smith <smith@chaquo.com>