Android: alarm定时很短时，比如500ms，测试执行mPowerManager.forceSuspend()后，系统不会suspend

参考文档：
https://blog.youkuaiyun.com/weixin_35691921/article/details/124961404

Android: alarm定时很短时，比如500ms，然后执行mPowerManager.forceSuspend()后，系统不会suspend，原因分析：

static int alarmtimer_suspend(struct device *dev)
{
   
    ...
	/* Find the soonest timer to expire*/
	for (i = 0