Switch makefile owners to MK_OWNERS

Bug: 278167548
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:060a2e65f6976227591588b69114c8488f21077b)
Merged-In: Icedf5981c6a9cd5d08ca9591de8960948dbeb1b3
Change-Id: Icedf5981c6a9cd5d08ca9591de8960948dbeb1b3
1 file changed