/**
   * When a voicemail source is removed, we don't always know which one was removed. Check the list
   * of registered phone accounts against the active subscriptions list and remove the inactive
   * sources.
   */
  public void removeInactiveSources() {
    for (PhoneAccountHandle phoneAccount : mActiveVvmSources) {
      if (!PhoneUtils.isPhoneAccountActive(mSubscriptionManager, phoneAccount)) {
        removeSource(phoneAccount);
      }
    }

    // Remove any orphaned phone state listeners as well.
    for (PhoneAccountHandle phoneAccount : mPhoneStateListenerMap.keySet()) {
      if (!PhoneUtils.isPhoneAccountActive(mSubscriptionManager, phoneAccount)) {
        removePhoneStateListener(phoneAccount);
      }
    }
  }
 public void removeSource(Phone phone) {
   removeSource(PhoneUtils.makePstnPhoneAccountHandle(phone));
 }