tree 5fc122441d8217fccce2fb7dc8c8a9d337441b04
parent c99c41781c69d2cfef411c531cf879e84ca62a74
author Mark Lu <Mark_Lu@htc.com> 1446794775 +0800
committer Amith Yamasani <yamasani@google.com> 1450396996 +0000

Fix system watchdog timeout when reading too many usage events.

Symptom:
As issue link:
https://code.google.com/p/android/issues/detail?id=193100

RootCause:
UsageStatsService.onDisplayChanged executed in system main thread,
If calling UsageStatsManager.queryEvents with too many events before it
(i.e. in daily usage event file,
too many activity resume / pause events or configuration change
during monkey test),
System will be blocked then watchdog timeout.

Solution:
Let display listener executed in background thread handler

BUG: 25355086

Change-Id: Ic894d112612400ed8fb7ba843b3309fdc4f66fe1
(Cherrypicked from 4e59db328d8b0cc163d2e3eb0f7f3a108f20a58d)
(cherry picked from commit 7018f60b06fd0c647ebf13225320d7e15d02e075)