Update OWNERS files

Change-Id: I87e21b50a247f82d65a3cd46cd1612676d9dcbe0
diff --git a/PACKAGE_MANAGER_OWNERS b/PACKAGE_MANAGER_OWNERS
index e4549b4..eb5842b 100644
--- a/PACKAGE_MANAGER_OWNERS
+++ b/PACKAGE_MANAGER_OWNERS
@@ -1,3 +1,3 @@
-chiuwinson@google.com
+alexbuy@google.com
 patb@google.com
 schfan@google.com
\ No newline at end of file