extended Setup to allow instrumentation of classes located in the dalvik package

In order to use robolectric for testing the [CucumberInstrumentation](https://github.com/cucumber/cucumber-jvm/blob/master/android/src/main/java/cucumber/api/android/CucumberInstrumentation.java) of the [cucumber-android](https://github.com/cucumber/cucumber-jvm/tree/master/android) project I would like to allow instrumentation of classes located in the dalvik package.