暂停后resume时间不太对

/**
     * 暂停
     */
    fun pause() {
        if (state != IntervalStatus.STATE_ACTIVE) return
        scope?.cancel()
        state = IntervalStatus.STATE_PAUSE
        delay = System.currentTimeMillis() - countTime
    }

重新恢复时的delay时长应该轮询间隔减去已等待的时间，delay=period-(System.currentTimeMillis() - countTime)