private void finishHowItWorksActivitiy() {
    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
    preferences.edit().putBoolean(AuthenticatorActivity.KEY_ONBOARDING_COMPLETED, true).commit();
    if (onFirstOnboardingExperience) {
      startActivity(new Intent(HowItWorksActivity.this, AddAccountActivity.class));
    }
    finish();
  }
Finish current {@link HowItWorksActivity}. If we are on the very first onboarding experience,
proceed to the {@link AddAccountActivity}.
java/com/google/android/apps/authenticator/howitworks/HowItWorksActivity.java