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

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

Change-Id: I7a0aff5c7d969b33386f501ebcf2845ecb9f7673
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>