feat: add support for system picker in setDisplayMediaRequestHandler (#43680)

* tmp

Co-authored-by: Samuel Attard <marshallofsound@electronjs.org>

* feat: add support for system picker in setDisplayMediaRequestHandler

Co-authored-by: Samuel Attard <marshallofsound@electronjs.org>

* oops

Co-authored-by: Samuel Attard <marshallofsound@electronjs.org>

* Apply suggestions from code review

Co-authored-by: Erick Zhao <erick@hotmail.ca>

Co-authored-by: Samuel Attard <sam@electronjs.org>

* stuff

Co-authored-by: Samuel Attard <marshallofsound@electronjs.org>

* well...

Co-authored-by: Samuel Attard <marshallofsound@electronjs.org>

* seems legit

Co-authored-by: Samuel Attard <marshallofsound@electronjs.org>

* chore: update patch to handle screenCapturer

Co-authored-by: Keeley Hammond <khammond@slack-corp.com>

* feat: modify API to use useSystemPicker

Co-authored-by: Keeley Hammond <khammond@slack-corp.com>

* fix: gate ScreenCaptureKitPicker to macos 15 or higher

Co-authored-by: Keeley Hammond <khammond@slack-corp.com>

* fix: don't use native picker with legacy media selection

Co-authored-by: Keeley Hammond <khammond@slack-corp.com>

* chore: code review, boolean set & docs update

Co-authored-by: Keeley Hammond <khammond@slack-corp.com>

* fix: add cancelCallback

Co-authored-by: Keeley Hammond <khammond@slack-corp.com>

* docs: clarify session & desktopCapturer docs

Co-authored-by: Keeley Hammond <khammond@slack-corp.com>

* chore: update patches

---------

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Samuel Attard <marshallofsound@electronjs.org>
Co-authored-by: Samuel Attard <sam@electronjs.org>
Co-authored-by: Keeley Hammond <khammond@slack-corp.com>

shell/browser/feature_list.h

@@ -11,6 +11,7 @@ namespace electron {
 void InitializeFeatureList();
 void InitializeFieldTrials();
 std::string EnablePlatformSpecificFeatures();
+std::string DisablePlatformSpecificFeatures();
 }  // namespace electron
 
 #endif  // ELECTRON_SHELL_BROWSER_FEATURE_LIST_H_