Add janitors to the OWNERS file

Test: TreeHugger
Change-Id: Iea1664580e1feb54ca4eefd8ef92dc0a7e112081
diff --git a/OWNERS b/OWNERS
index e6227e0..e61acdd 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1 +1,2 @@
 include platform/frameworks/base:/SQLITE_OWNERS
+include platform/system/core:/janitors/OWNERS #{LAST_RESORT_SUGGESTION}