Switch makefile owners to MK_OWNERS am: 973d618f32 am: 5d52e4511a

Original change: https://android-review.googlesource.com/c/device/google/gs101/+/3107248

Change-Id: I2200072a8c2275ea91837b11663e8b90fd6c3d18
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>