Previously everything lived in an inner class method of
SettingsRobolectricTestRunner. That method has now been turned into
a static method so that it can be called by other runners.
Bug: 62460102
Test: robotests
Change-Id: I6612b1f26404587301c534c8ba60e39d59d6c840
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
