ReadStringView() is a simple alternative to ReadString() but doesn't involve a heap allocation for a new std::string. Using the new methods in one place to start with. Bug: none Change-Id: I1100c6d258ffb4c8a31a46ba88a7f8bff9cf35cb Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/332120 Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#41533}