[chromedriver] Add helper methods for settting Android[Activity|Process] options.

BUG=None
R=kkania@chromium.org

Review URL: https://codereview.chromium.org/63563002

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/webdriver@233991 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
3 files changed