Add missing team members to OWNERS

Change-Id: I30a8e66839655f23b37596098990f269adcdd3cc
diff --git a/OWNERS b/OWNERS
index f0ccd82..937a243 100644
--- a/OWNERS
+++ b/OWNERS
@@ -7,12 +7,15 @@
 asmundak@google.com
 ccross@android.com
 cparsons@google.com
+delmerico@google.com
 dwillemsen@google.com
 eakammer@google.com
 jobredeaux@google.com
 joeo@google.com
 lamontjones@google.com
 spandandas@google.com
+tradical@google.com
+usta@google.com
 weiwli@google.com
 yudiliu@google.com
 yuntaoxu@google.com