Fix complex script runtime issues (#7142)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/488551667048375/task/1211981173033273?focus=true

### Description
A last minute seemingly innocent refactor in [✓ 👩‍💻 Create artificially
complex
script](https://app.asana.com/1/137249556945/task/1211793818697003) is
causing Uncaught ReferenceError: Cannot access 'stateManager' before
initialization , which prevents the script from fully executing

### Steps to test this PR

_Feature 1_
- [ ] Set `const val PRIVACY_REMOTE_CONFIG_URL =
"https://api.jsonblob.com/019a97b1-c9a7-768f-8cad-bc5c8f4f6f7e"`
- [ ] Fresh install
- [ ] Load a site
- [ ] Open Chrome console and check logs for
    - [ ] `Posting initial ping...`
    - [ ] `Performance measures: `
    - [ ] `Messaging feature initialized`
    - [ ] `ddgBlobDownloadObj received Pong from Native`
    - [ ] `Performance feature initialized`
    - [ ] `window received ...`

### UI changes
n/a

Author: CrisBarreiro

app/src/main/res/raw/webviewcompat_complex_test_script.js

@@ -27,38 +27,22 @@
     // Listen to ddgObj messages
     ddgObj.addEventListener('message', function(event) {
         console.log("[complex script] $OBJECT_NAME$-$SCRIPT_ID$ received", event.data);
-        
-        stateManager.setState(state => ({
-            ...state,
-            messageCount: state.messageCount + 1,
-            lastMessageTime: Date.now()
-        }));
-        
-        eventBus.emit('message-received', { source: '$OBJECT_NAME$-$SCRIPT_ID$', data: event.data });
-        
+
         if (replyToNativeMessages && supportedMessages.includes(event.data)) {
             const response = messagePrefix + event.data + " from $OBJECT_NAME$-$SCRIPT_ID$";
             ddgObj.postMessage(response);
-            throttledLog('[complex-script]-$SCRIPT_ID$ Sent response:', response);
+            console.log('[complex-script]-$SCRIPT_ID$ Sent response:', response);
         }
     });
 
     // Listen to window messages
     window.addEventListener('message', function(event) {
         console.log("[complex-script] window-$SCRIPT_ID$ received", event.data);
 
-        stateManager.setState(state => ({
-            ...state,
-            messageCount: state.messageCount + 1,
-            lastMessageTime: Date.now()
-        }));
-        
-        eventBus.emit('message-received', { source: 'window-$SCRIPT_ID$', data: event.data });
-        
         if (replyToNativeMessages && supportedMessages.includes(event.data)) {
             const response = messagePrefix + event.data + " from window-$SCRIPT_ID$";
             ddgObj.postMessage(response);
-            throttledLog('[complex-script]-$SCRIPT_ID$ Sent response:', response);
+            console.log('[complex-script]-$SCRIPT_ID$ Sent response:', response);
         }
     });