Set noparent in api/stats/OWNERS.

This avoids the risk of a higher level owner approving something getting
added to the getStats() API without +1s from stats owners.

Bug: None
Change-Id: Iedd7133d0e943d1db6977dc0e1d406e5b545e31a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/311543
Reviewed-by: Philipp Hancke <phancke@microsoft.com>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40412}
diff --git a/api/stats/OWNERS b/api/stats/OWNERS
index 7e98070..1556231 100644
--- a/api/stats/OWNERS
+++ b/api/stats/OWNERS
@@ -1,2 +1,3 @@
+set noparent
 hbos@webrtc.org
 hta@webrtc.org