| AndroidJUnit4 | Aliases the current default Android JUnit 4 class runner, for future-proofing. | 
| AndroidJUnitRunner | An Instrumentationthat runs JUnit3 and JUnit4 tests against
 an Android package (application). | 
| MonitoringInstrumentation | An instrumentation that enables several advanced features and makes some hard guarantees about the state of the application under instrumentation. | 
| MonitoringInstrumentation.ActivityFinisher | Loops through all the activities that have not yet finished and explicitly calls finish on them. |