@VisibleForTesting
  int setViewPagerCurrentItem(int position) {
    pager.setCurrentItem(position);
    return pager.getCurrentItem();
  }
Set the current item of the view pager.

@param position the position of the item we want to set for the view pager.
@return the current iteam of the view pager after setting action.
java/com/google/android/apps/authenticator/howitworks/HowItWorksActivity.java