[145] [omnibox][contextual-tasks] Adds Permission for Voice Input

Original change's description:
> [omnibox][contextual-tasks] Adds Permission for Voice Input
> 
> This CL implements full Media Permission support for Omnibox AIM Popup
> and Co-Browsing Side Panel for using voice input via the Web Speech API.
> 
> Embedded WebContents lack the permission infrastructure that tabs
> receive automatically, resulting in denied media requests, no user
> prompts, and privacy risks from auto-granted permissions to chrome://
> origins. These changes ensure users receive proper permission prompts,
> enable permission sharing with google.com, and eliminate privacy risks.
> 
> http://screencast/cast/NTM5Nzk1Mzg0NDg3MTE2OHw4ZjU5NTAxMy01Mw
> 
> Key changes include:
> 
> chrome_permissions_client.cc:
> - Generalizes GetEmbeddingOriginOverride() to give embedded WebUI
>   components their own permission identity
> - Extends GetCanonicalOriginOverride() to transform chrome:// origins
>   to google.com for proper permission prompts and storage
> - Expands CanBypassEmbeddingOriginCheck() to allow intentional origin
>   mismatch for Omnibox/Co-Browsing
> 
> omnibox_popup_webui_base_content.cc
> contextual_tasks_side_panel_coordinator.cc:
> - Sets ViewType to kComponent to mark WebContents as trusted browser UI.
> - Implements RequestMediaAccessPermission() to forward requests to
>   MediaCaptureDevicesDispatcher.
> - Attaches PermissionRequestManager to enable permission prompt UI
> 
> omnibox_popup_aim_presenter.cc:
> - Fixes premature prompt dismissal when permission bubble gains focus
>   during widget activation changes
> 
> chip_controller.cc:
> - Prevents permission request cancellation during UI state changes for
>   Omnibox and Contextual Tasks
> 
> permission_prompt_factory.cc:
> - Adds BrowserWindowInterface fallback to anchor prompts for embedded
>   WebContents.
> - Exempts Omnibox and Co-Browsing from location bar editing/empty state
>   checks that suppress prompts
> 
> 
> Bug: 477317007
> Change-Id: Idcb0f4a17d4ae0d01eb18391ca6accbec475e02b
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7515301
> Reviewed-by: Sophie Chang <sophiechang@chromium.org>
> Reviewed-by: Elias Klim <elklm@chromium.org>
> Reviewed-by: Balazs Engedy <engedy@chromium.org>
> Commit-Queue: Moe Ahmadi <mahmadi@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1576889}

Bug: 480629856
Change-Id: Idcb0f4a17d4ae0d01eb18391ca6accbec475e02b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7538704
Reviewed-by: Sophie Chang <sophiechang@chromium.org>
Owners-Override: Srinivas Sista <srinivassista@chromium.org>
Commit-Queue: Justin Donnelly <jdonnelly@chromium.org>
Cr-Commit-Position: refs/branch-heads/7632@{#1763}
Cr-Branched-From: 0bbdf2913883391365383b0a5dfe7bf9fd1a5213-refs/heads/main@{#1568190}