Adding metrics to alarm manager
Push atoms: - Every time an alarm is scheduled, we push some attributes of the alarm and the reason why such an alarm was allowed. This will help audit spammy behavior from apps that misuse alarm API, e.g. apps that have SCHEDULE_EXACT_ALARM. - Every time an alarm batch is delivered, we log the size of the batch and whether or not it was a wakeup batch. This is the essential measure of alarm manager's batching efficiency. Pulled atoms: - Logging general stats on pending alarms every once in a while. Test: atest CtsAlarmManagerTestCases atest FrameworksMockingServicesTests:com.android.server.alarm statsd-testdrive 377 378 10106 Bug: 161497385 Bug: 171306433 Bug: 177556103 Change-Id: Ib13c9c380b641d318c6b8777996aa37f9b3d1bfc
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