private void scheduleNextInvocation() {
    long now = mClock.nowMillis();
    long counterValueAge = getCounterValueAge(now);
    long timeTillNextInvocation =
        mRemainingTimeNotificationPeriod - (counterValueAge % mRemainingTimeNotificationPeriod);
    mHandler.postDelayed(this, timeTillNextInvocation);
  }
Stops this task. This task will never notify the listener after the task has been stopped.
java/com/google/android/apps/authenticator/otp/TotpCountdownTask.java