Updating Android Developer toolkit and Chrome Driver.
Adding intent to call on package.
Bail if non-emulator Android devices are detected.
Better detection of emulator crashing.
Create cache buster at test-runner level and pass it down.

This means that 100 unique copies of web-animation.js (and similar files) are
not loaded when running inside the test-runner (a big performance problem for
Android).
Split the test run into two parts so it completes.