Always re-establish kernel alarms when considering new alarm set

As a backstop against missed alarm delivery / wakeups or clock slew,
make sure to always schedule a kernel alarm for the next alarm events
of interest when we've reexamined the set of deliverable alarms.

Bug 19201933

Change-Id: I3cd37a63dfb0c8258941497d4ba516ed00e2edad
1 file changed