DO NOT MERGE ANYWHERE: UsageStats: Use new settings key idle_duration2 for app idle am: 1559fed4c4  -s ours am: 5c9378f310  -s ours
am: d828c95a93  -s ours

* commit 'd828c95a930c6789f6251bc8a120bf2293a3a22e':
  DO NOT MERGE ANYWHERE: UsageStats: Use new settings key idle_duration2 for app idle