Update third_party/apache-portable-runtime OWNERS

Assign ownership to Cronet instead of net, net will maintain non-direct
ownership through Cronet's OWNERS file. This is to better reflect the
fact that apr is only used by Cronet (through netty-tcnative) and future
issues should be fixed by Cronet's team.

Bug: 1347085
Change-Id: I91c7f9d235a2270b45116fb847aa030031f3b7e2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3804640
Commit-Queue: Stefano Duo <stefanoduo@google.com>
Reviewed-by: Adam Rice <ricea@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1031062}

third_party/apache-portable-runtime/OWNERS

@@ -1 +1 @@
-file://net/OWNERS
+file://components/cronet/OWNERS