Add MK_OWNERS as owners file for makefile am: 82a8451d2a am: 127be6aaff

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

Change-Id: I61f3ea0556475b30f148eca5a867f66ca7b6520c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>