Add a switch to use WebSockets for web debug proxy (#54083)

packages/flutter_tools/lib/src/device.dart

diff --git a/packages/flutter_tools/lib/src/device.dart b/packages/flutter_tools/lib/src/device.dart
index 85309ff..b5a54fb 100644
--- a/packages/flutter_tools/lib/src/device.dart
+++ b/packages/flutter_tools/lib/src/device.dart
@@ -585,6 +585,7 @@
     this.hostname,
     this.port,
     this.webEnableExposeUrl,
+    this.webUseSseForDebugProxy = true,
     this.webRunHeadless = false,
     this.webBrowserDebugPort,
     this.vmserviceOutFile,
@@ -596,6 +597,7 @@
       this.port,
       this.hostname,
       this.webEnableExposeUrl,
+      this.webUseSseForDebugProxy = true,
       this.webRunHeadless = false,
       this.webBrowserDebugPort,
       this.cacheSkSL = false,
@@ -640,6 +642,7 @@
   final String port;
   final String hostname;
   final bool webEnableExposeUrl;
+  final bool webUseSseForDebugProxy;
 
   /// Whether to run the browser in headless mode.
   ///