message: Fix androidx dependency for Android example
diff: @@ -61,7 +61,7 @@ import android.widget.ListView;
  import android.widget.NumberPicker;
  import android.widget.TextView;
  import android.widget.Toast;
  -import androidx.legacy.app.FragmentCompat;
  +import android.support.v13.app.FragmentCompat;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Arrays;
  