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}