This version replaces the previous uiauto version of Speedometer with a new
version.
* Supports both chrome and chromium again, this is selected with the
chrome_package parameter.
* No longer needs internet access.
* Version 1.0 of Speedometer is no longer supported.
* Requires root:
- sometimes uiautomator dump doesn't capture the score if not run as root
- need to modify the browser's XML preferences file to bypass T&C acceptance
screen
