That accessor forces test helpers to create BasicPortAllocator themself
rather than deligate such task to PeerConnectionFactory
Bug: webrtc:42232556
Change-Id: I262e032da110222198e6308f57a5e5f2d7ba4601
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/376741
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#43870}
8a97881882