Merge "Add OWNERS for UsageStats related classes." am: e9f11554d6 am: 08b23493b5 am: 0c3e7453a2 am: cef13c69d9

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1959074

Change-Id: I364ab78d87380a496b9a2e4992a4f1ed5705a1fc