Environment provides non-null interface for FieldTrialsView and thus VideoCodingModule no longer need to rely on FieldTrialBasedConfig class to provide field_trials when not passed at construction. Bug: webrtc:10335 Change-Id: Iedfb29e8b29056618a85f2e7a1528da29e3be5c1 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/347701 Auto-Submit: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Philip Eliasson <philipel@webrtc.org> Commit-Queue: Philip Eliasson <philipel@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42163}