Reland "Ignore echo cancellation for all sources except mic and desktop capture."

This reverts commit 22cfa1732484d5b19b25df576b12a8e6200158a3.

Reason for revert: making sure echo cancellation is not applied

Original change's description:
> Revert "Ignore echo cancellation for all sources except mic and desktop capture."
>
> This reverts commit 45baca190cc32be227effd2712ecee20d00da67b.
>
> Reason for revert: Needs a little fix
>
> Original change's description:
> > Ignore echo cancellation for all sources except mic and desktop capture.
> >
> > Various sources such as GUM_DESKTOP_AUDIO_CAPTURE, GUM_TAB_AUDIO_CAPTURE, etc. may have echo cancellation on by default - but it's not applicable, so we should just ignore it. Platform echo cancellation would only be activated for mic streams, in case there is a platform effect available.
> >
> > Bug: 443695127
> > Change-Id: I9dd6b46d278b3feda81aef0577dea480e5b41f9e
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6930297
> > Reviewed-by: Guido Urdaneta <guidou@chromium.org>
> > Commit-Queue: Olga Sharonova <olka@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#1513208}
>
> Bug: 443695127
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Change-Id: Ie4660f365dcc42fe83d35bbdc8e8e43b73527b0a
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6932503
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Commit-Queue: Olga Sharonova <olka@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1513239}

Bug: 443695127
Change-Id: I1b5ed21fbfb07cba7d9e8f156870db3692b49e69
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6935363
Commit-Queue: Olga Sharonova <olka@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1513707}