OWNERS: update to include test platform team

Change-Id: Ia963964b753eca31ccfa076e386d3c0f47a8cc48
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra_virtualenv/+/2288585
Reviewed-by: Dhanya Ganesh <dhanyaganesh@chromium.org>
Commit-Queue: Sean Abraham <seanabraham@chromium.org>
Tested-by: Sean Abraham <seanabraham@chromium.org>
diff --git a/OWNERS b/OWNERS
index 2131ccb..c18bf72 100644
--- a/OWNERS
+++ b/OWNERS
@@ -2,8 +2,6 @@
 pprabhu@chromium.org
 xixuan@chromium.org
 
-# Build Team
 include chromiumos/chromite:/OWNERS.build
-
-# CI team
 include chromiumos/chromite:/OWNERS.ci
+include chromiumos/chromite:/OWNERS.testplatform
\ No newline at end of file