ScheduledJobStateChanged: add stop reason

Adds stop reason to scheduled job state changed

Bug: b/71755130
Test: cts-tradefed run cts-dev -m CtsStatsdHostTestCases -t android.cts.statsd.atom.UidAtomTests#testScheduledJobState
Test: cts-tradefed run cts-dev -m CtsIncidentHostTestCases -t com.android.server.cts.JobSchedulerIncidentTest
Change-Id: Ic29a5e9160ac258140a52d31bc6210300949545d