Improving WTF logging in AlarmManager

Logs could have been misleading if the alarm thread was switched out and
did not get to process alarms for some time.

Test: Builds, boots, existing tests CtsAlarmManagerTestCases pass

Bug: 78560047
Change-Id: Ib450c3f7a936ab127cbd9d87eff78f1c589d9701
1 file changed