Add MK_OWNERS as owners file for makefile am: 82a8451d2a

Original change: https://android-review.googlesource.com/c/device/google/gs-common/+/3102997

Change-Id: I8afc931b8b3639a47b912020f214c6e15ea14e54
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>