The custom test runner lets us use resources from
multiple projects which resolves many ResourceNotFound
errors that would come up when people who made changes
wrote tests.
Test: make RunSettingsRoboTests
Bug: 32180625
Change-Id: I71f30eecc1164b117351a74b3ea0533625feae5b
Refactored getLocaleNames() into a FeatureProvider interface so it's
reusable and testable.
Bug: 31801428
Test: RunSettingsRoboTests
Change-Id: I2d31a66a4b32cfa7a364a4cfef1f6eea87084577
Also added a FakeFeatureFactory to make it easier to mock different
FeatureProviders.
Bug: 31781480
Test: make RunSettingsRoboTests
Change-Id: Ie45db601e0bec951d7ef983ec2e3ca747ec1c3af
