Setup CarSetupWizardLib Robolectric Testing

Added support for robolectric tests in CarSetupWizardLib.
Created CarSetupWizardLayout tests.

Change-Id: Ide9d163952675253b2417c8a17695d4b0f7d082c
Fixes: 68728633
Test: make RunCarSetupWizardLibRoboTests -j<numThreads> works
Test: CarSetupWizard still builds
Test: Able to purposely make tests fail