LibWebView: Add do-not-track setting to about:settings

Author: https://github.com/trflynn89
Commit: 1be3e7fd8a
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4194
Reviewed-by: https://github.com/AtkinsSJ

Libraries/LibWebView/ViewImplementation.h

@@ -265,6 +265,7 @@ protected:
     void handle_web_content_process_crash(LoadErrorPage = LoadErrorPage::Yes);
 
     virtual void autoplay_settings_changed() override;
+    virtual void do_not_track_changed() override;
 
     struct SharedBitmap {
         i32 id { -1 };