Switch makefile owners to MK_OWNERS

Bug: 278167548
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:5f120c3f726c7ecdb4e2766906c54bfdf7ee7345)
Merged-In: I017b43e34f20d85ac204eef211ef2b2a177f8dbb
Change-Id: I017b43e34f20d85ac204eef211ef2b2a177f8dbb
diff --git a/OWNERS b/OWNERS
index e434a1c..f5be82c 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,4 +1,4 @@
 per-file powerhint-*.json = [email protected],[email protected],[email protected],[email protected]
 
 # 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