/**
   * Hides or shows the conference manager fragment.
   *
   * @param show {@code true} if the conference manager should be shown, {@code false} if it should
   *     be hidden.
   */
  public void showConferenceCallManager(boolean show) {
    mConferenceManagerFragment.setVisible(show);

    // Need to hide the call card fragment to ensure that accessibility service does not try to
    // give focus to the call card when the conference manager is visible.
    mCallCardFragment.getView().setVisibility(show ? View.GONE : View.VISIBLE);
  }