Reland "[VoiceIsolation] Add new stream effect VoiceIsolation."

This reverts commit 8525e454b007e742d1817b03fbe824a5f30d7aab.

Reason for revert: The revert is caused by Kevin build failed.
The latest image built for Kevin is on 15511 while the dependent change(crrev/c/4206140) is landed on 15514.

Kevin is EOL in M116 and is replaced by jacuzzi for LKGM CL.(More context: b/290268385)

Original change's description:
> Revert "[VoiceIsolation] Add new stream effect VoiceIsolation."
>
> This reverts commit 6eac3ae3f0b40f0fdcc292b77549405dbfbfb402.
>
> Reason for revert: build break: https://ci.chromium.org/ui/p/chrome/builders/ci/chromeos-kevin-chrome/27478/overview
>
> Original change's description:
> > [VoiceIsolation] Add new stream effect VoiceIsolation.
> >
> > New api introduced to provide the options to force turn on/off system
> > voice isolation(NC) effect and check the platform availability.
> >
> > The control will be a tri-state composed of two bits(browser_controlled_{effect}, {effect}).
> >  !browser_controlled_{effect}: leave as platform default.
> >  browser_controlled_{effect} && {effect}: force enable platform {effect}
> >  browser_controlled_{effect} && !{effect}: force disable platform {effect}
> >
> > Design: https://docs.google.com/document/d/1a1zy_wYTgKhaPIAZ53lR8Y1RQzuzhND_kV7PLlP5WzE/edit?resourcekey=0-snrCqjLZrU8Bt9V0kW2hZA#heading=h.c0uts5ftkk58
> >
> >
> > Cq-Depend: chromium:4206140
> > BUG=b:218593870
> > TEST=build chrome, deploy to dut and verify
> >
> > Change-Id: Ifcc30a2c36c356b59734eb0972d502087f7870ee
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4225006
> > Commit-Queue: Eddy Hsu <[email protected]>
> > Reviewed-by: Dale Curtis <[email protected]>
> > Reviewed-by: Caitlin Fischer <[email protected]>
> > Reviewed-by: Olga Sharonova <[email protected]>
> > Reviewed-by: Yu-Hsuan Hsu <[email protected]>
> > Reviewed-by: Sam Zackrisson <[email protected]>
> > Cr-Commit-Position: refs/heads/main@{#1166113}
>
> BUG=b:218593870
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
>
> Change-Id: Ie46f2667cb1dd8d147d7946944ec6085409dcb3d
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4667948
> Owners-Override: Hayato Ito <[email protected]>
> Reviewed-by: Hayato Ito <[email protected]>
> Reviewed-by: Dale Curtis <[email protected]>
> Reviewed-by: Caitlin Fischer <[email protected]>
> Auto-Submit: Xiaoling Bao <[email protected]>
> Commit-Queue: Hayato Ito <[email protected]>
> Bot-Commit: Rubber Stamper <[email protected]>
> Cr-Commit-Position: refs/heads/main@{#1166330}

BUG=b:218593870

Change-Id: I97fc4e99b9b7c5088af022bb517d960c159ebe05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4676142
Reviewed-by: Tomas Gunnarsson <[email protected]>
Reviewed-by: Li-Yu Yu <[email protected]>
Reviewed-by: Caitlin Fischer <[email protected]>
Reviewed-by: Yu-Hsuan Hsu <[email protected]>
Reviewed-by: Hayato Ito <[email protected]>
Commit-Queue: Eddy Hsu <[email protected]>
Reviewed-by: Dale Curtis <[email protected]>
Reviewed-by: Sam Zackrisson <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1170101}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 56d078a..b1c8bac 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -6918,6 +6918,11 @@
 const char kShowForceRespectUiGainsToggleDescription[] =
     "Enable a setting toggle to force respect UI gains.";
 
+const char kCrOSSystemVoiceIsolationOptionName[] =
+    "Enable the options of setting system voice isolation per stream";
+const char kCrOSSystemVoiceIsolationOptionDescription[] =
+    "Enable the options of setting system voice isolation per stream.";
+
 const char kCrosPrivacyHubName[] = "Enable ChromeOS Privacy Hub";
 const char kCrosPrivacyHubDescription[] = "Enables ChromeOS Privacy Hub.";