Revert "MediaStreamAudioSource: Organize audio processing layout calculations"

This reverts commit d19b62789ed2f2ade012b822b3ed0bb117b27113.

Reason for revert: Bug: 422611724

Bug: 405165917
Original change's description:
> MediaStreamAudioSource: Organize audio processing layout calculations
>
> Introduces MediaStreamAudioProcessingLayout, which,
> based on the requested AudioProcessingProperties and available device
> effects, determines what processing should be done in WebRTC and what
> should be delegated to the platform, as well as configures necessary
> AudioProcessingSettings for WebRTC processing.
>
> A variety of decisions which used to be made in MediaStreamAudioProcessor::WouldModifyAudio()
> ProcessedLocalAudioSource::EnsureSourceIsStarted()
> AudioProcessingProperties::ToAudioProcessingSettings()
>
> are now combined under one roof.
> No behavioral changes.
>
> Bug: 405165917
> Change-Id: Ib3dccc74a47cfede090bab539615175853543028
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6554248
> Commit-Queue: Olga Sharonova <olka@chromium.org>
> Reviewed-by: Sam Zackrisson <saza@chromium.org>
> Reviewed-by: Per Åhgren <peah@chromium.org>
> Auto-Submit: Olga Sharonova <olka@chromium.org>
> Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1463890}

Bug: 405165917
Change-Id: I15cb27f17e4cdd81bfe472007172d53ca3871623
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6624364
Reviewed-by: Sam Zackrisson <saza@chromium.org>
Commit-Queue: Olga Sharonova <olka@chromium.org>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1471680}