Add/move owners to different level of the repo

Ensure folks who are familiar with the sub-set of the repo
are properly listed in addition to the root repo owners.

Test: None
Bug: 118129499
Change-Id: I09187cc4622adc570772f31516f5371b3359d4ac
diff --git a/OWNERS b/OWNERS
index 059e5d8..6c45e98 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,8 +1,8 @@
+# Root Owners of the Tradefed repo for code reviews
+dshi@google.com
 erowe@google.com
 guangzhu@google.com
 jdesprez@google.com
-kevcheng@google.com
-mikehoran@google.com
 moonk@google.com
 sbasi@google.com
 tsu@google.com