title: Android Studio import com.google.android.vending.expansion.zipfile.ZipResourceFile; does not exist
body: <p>I am trying to setup the apk expansion setup. I added the SampleDownloaderActivity.java but I am getting these errors once I rebuild the project</p>
  <p>import com.google.android.vending.expansion.zipfile.ZipResourceFile; does not exist
  import com.google.android.vending.expansion.zipfile.ZipResourceFile.ZipEntryRO; does not exist</p>
  <p>What is the alternative to correct this?</p>