title: Tests down if run with Robolectric for apps with data-binding in module(s)
body: <p>Tests couldn't go on if the App is based on multi-modules.</p>
  
  <p>A normal app
   - base-app(baseFeature)
   - some other modules
   - install (apk)
   - instant (instant app)</p>
  
  <p>I have added all these in <code>gradle.properties</code>, however, the tests cannot go on, they throw 
  <code>
  java.lang.NoClassDefFoundError: android/databinding/DataBinderMapperImpl</code></p>
  
  <p><code>
  android.enableD8.desugaring=true
  android.databinding.enableV2=true
  android.enableExperimentalFeatureDatabinding=true
  </code></p>
  
  <p>I am sure that all works before I switched to multi-modules.</p>
  
  <p>Version of robolectric: 3.7.1</p>
  
  <p><a href="https://github.com/robolectric/robolectric/issues/3789" rel="noreferrer">issue</a></p>