tree 273a90e8c7d3543d205e2f14596bf9692c7f415f
parent 1e24c428efa7b0836154fa909bdcf2d3e7210462
author Adam Lesinski <adamlesinski@google.com> 1452219893 -0800
committer The Android Automerger <android-build@google.com> 1456348869 -0800

DO NOT MERGE ANYWHERE: UsageStatsService: Fix app idle issue at rollover time

App Idle queries are very frequent and so they only check in memory stats.
However, in memory stats can be missing some entries, especially after a rollover, but also
due to a larger bug fixed in master (too risky to take now).

The fix is to do a deep query (reading older files from disk) and maintain a parallel cache
of stats for app idle. That way the rolling window of data required to serve app idle queries
stays in memory.

Bug:26355386
Change-Id: I6a29bbc25214f6a3c2f24c8c079936e66f99e42e