The latest version of the selenium/standalone-chrome docker image appears to
be out of sync with the API that we're using and there is no more recent
version of the API available in maven central.
This change pins us to the earlier version and fixes our CI build.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=245286532
Previously we had a few customized Gradle build task to manage
the Docker container for provisioning browser and ChromeDriverService
used by WebDriver tests. This CL changed to use a java library
from testcontainers.org to achieve the same purpose. The main
benefit of it is that we can expect to run the WebDriver tests
from IDE going forward.
Also, this CL refactored the structure of WebDriver related classes
to have JUnit rule to manage the lifecycle of WebDriver instance,
this is also compatible with the API from testcontainers library.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=241539861
