Switch makefile owners to MK_OWNERS

Bug: 278167548
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:aa3eb14d33c1b5f93fb7f496eb625f3829d1325d)
Merged-In: I58886a7c812960f7ef7d14a4d9c0b0ccabd4b8ef
Change-Id: I58886a7c812960f7ef7d14a4d9c0b0ccabd4b8ef
diff --git a/OWNERS b/OWNERS
index 0914422..c7a36d1 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,4 +1,4 @@
 per-file perf/*,thermal/*= jenhaochen@google.com,wvw@google.com,joaodias@google.com
 
 # per-file for Pixel device makefiles, see go/pixel-device-mk-owner-checklist for details.
-per-file *.mk,*/BoardConfig.mk=file:device/google/gs-common:main:/OWNERS
+per-file *.mk,*/BoardConfig.mk=file:device/google/gs-common:main:/MK_OWNERS