[MSE-110] Ada chat Flutter implementation. Small fixes (#7)

* Add userid test value

* Fix the error "Ada Embed - User is in the wrong rollout group."

* Fix adaReadyCallback parameter

* Show settings

* Set rolloutOverride settings to fix the error: "Ada Embed - User is in the wrong rollout group."

* Change Ada handle for example

packages/ada_chat_flutter/example/lib/ada_chat_screen.dart

@@ -34,28 +34,31 @@ class _AdaChatScreenState extends State<AdaChatScreen> {
         body: Stack(
           children: [
             AdaWebView(
-              handle: 'headspace-sandbox',
-              name: 'John Doe',
+              handle: 'example-handle',
+              name: 'User 1',
               email: '[email protected]',
-              phone: '+234345566789',
+              phone: '+5342342131324',
               greeting: widget.greeting,
               controller: _adaController,
               language: 'en',
               metaFields: const {
+                'userid': '1234567890',
                 'keyStr': 'value3',
                 'keyBool': false,
                 'keyDouble': 3.456789,
                 'keyInt': 42,
                 'keyNull': null,
               },
+              rolloutOverride: 1,
               sensitiveMetaFields: const {
                 'keySens': 'valueSens',
               },
               onProgressChanged: (progress) => setState(() {
                 _progress = progress / 100;
               }),
-              onAdaReady: () {
-                debugPrint('AdaChatScreen:onAdaReady');
+              onAdaReady: (isRolledOut) {
+                debugPrint(
+                    'AdaChatScreen:onAdaReady: isRolledOut=$isRolledOut');
                 setState(() => _progress = 0);
               },
               onLoaded: (data) =>

packages/ada_chat_flutter/lib/src/ada_web_view.dart

@@ -81,7 +81,7 @@ class AdaWebView extends StatefulWidget {
   final void Function(int progress)? onProgressChanged;
 
   final void Function(dynamic data)? onLoaded;
-  final VoidCallback? onAdaReady;
+  final void Function(dynamic isRolledOut)? onAdaReady;
   final void Function(dynamic event)? onEvent;
   final void Function(dynamic event)? onConversationEnd;
   final void Function(bool isDrawerOpen)? onDrawerToggle;
@@ -182,15 +182,15 @@ window.adaSettings = {
   lazy: true,
   parentElement: "content_frame",
   onAdaEmbedLoaded: () => {
-     adaEmbed.subscribeEvent("ada:chat_frame_timeout", (data, context) => {
+    adaEmbed.subscribeEvent("ada:chat_frame_timeout", (data, context) => {
        window.flutter_inappwebview.callHandler("onLoaded", data);
-     });
+    });
   },
   conversationEndCallback: function(event) {
     window.flutter_inappwebview.callHandler("onConversationEnd", event);
   },
-  adaReadyCallback: function() {
-    window.flutter_inappwebview.callHandler("onAdaReady");
+  adaReadyCallback: function(isRolledOut) {
+    window.flutter_inappwebview.callHandler("onAdaReady", isRolledOut);
   },
   toggleCallback: function(isDrawerOpen) {
     window.flutter_inappwebview.callHandler("onDrawerToggle", isDrawerOpen);
@@ -201,7 +201,7 @@ window.adaSettings = {
     }
   }
 };
-console.log("adaSettings updated");
+console.log("adaSettings: " + JSON.stringify(window.adaSettings));
 ''',
     );
 
@@ -243,7 +243,7 @@ console.log("adaSettings updated");
 
     controller.addJavaScriptHandler(
       handlerName: 'onAdaReady',
-      callback: (_) => widget.onAdaReady?.call(),
+      callback: (isRolledOut) => widget.onAdaReady?.call(isRolledOut),
     );
 
     controller.addJavaScriptHandler(