
Add field trials to audio api. It is added as a pointer with nullptr as default. It is not (yet) used anywhere. Usage of field trials comes in subsequent patches. Bug: webrtc:10335 Change-Id: Icbe22d95c356a6fefde34590f11ea63f005ab09e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/255521 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Jonas Oreland <jonaso@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36213}