Switch makefile owners to MK_OWNERS

Bug: 278167548
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:767a506f07f82fb922c887f14b850d1cb5292227)
Merged-In: Iffb4e4aaaf25a11b9ef31fdb9f3838da709e1723
Change-Id: Iffb4e4aaaf25a11b9ef31fdb9f3838da709e1723
1 file changed