create automated unit tests for the sample application

[MichaelAubertMonument]

All SDK users will take inspiration from the sample application
They will all integrate the SDK into application that contain automated tests
It would be very useful to confirm that, for example, the SDK doesn't preclude the use of Robolectric in the application main module
More generally, this would help you identify any restrictions the SDK might create on application architecture (and to fix them once identified)

[cb-amutha]

@MichaelAubertMonument Thanks for raising this. We have unit tests for the SDK level. we will update the example app with end-to-end test. This will be available in the future. Please let us know if any issues faced in application level while writing the test case related to the SDK. Thanks