Reorder ART's `OWNERS` file. am: 3f93ffb13b am: a176ef5f8b

Original change: https://android-review.googlesource.com/c/platform/art/+/2311866

Change-Id: Ie4621f09d216823367dde0a770c4b4afef0d687e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>