This removes internal usage of AsyncResolver, including from
PhysicalSocketServer.
PhysicalSocketServer was also run through IWYU.
Bug: webrtc:12598
Change-Id: I18aa6fb60e4a40face4afa0446a161379470680d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/322721
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40900}