dx/etc/mainDexClasses.rules

  -keep public class * extends android.app.Instrumentation {
    <init>();
  }
  -keep public class * extends android.app.Application {
    <init>();
    void attachBaseContext(android.content.Context);
  }
  -keep public class * extends android.app.Activity {
    <init>();
  }
  -keep public class * extends android.app.Service {
    <init>();
  }
  -keep public class * extends android.content.ContentProvider {
   <init>();
  }
  -keep public class * extends android.content.BroadcastReceiver {
   <init>();
  }
  -keep public class * extends android.app.backup.BackupAgent {
   <init>();
  }