Switch makefile owners to MK_OWNERS

Bug: 278167548
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:621df82f7af10ff85fa290af75c729f734cb2938)
Merged-In: I7c3083ad4d881334c6f8f78d89b6a31fcd46c42e
Change-Id: I7c3083ad4d881334c6f8f78d89b6a31fcd46c42e
1 file changed