Add OWNERS file for power AIDL. am: 54f0b5287e am: 6b4861ca13 am: a3b783dfee am: 9beaa75893 am: 675a426e9b

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2220004

Change-Id: Id6436f58b62ec814fa4c3feb56e6b2c73c7a710f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>