Add large script (#7116)

Task/Issue URL:
https://app.asana.com/1/137249556945/task/1211935414190419?focus=true

### Description
Add support to inject large no-op script behind RC flag

### Steps to test this PR

_Feature 1_
- [ ] Open feature flags inventory and set
    - [ ] `webViewCompat` to enabled
    - [ ] `jsSendsInitialPing` to enabled
    - [ ] `useLargeScript` to enabled
 - [ ] Inspect WebView on a Chromium-based browser
 - [ ] Check console for `[large script Posting initial ping...`

### UI changes
| Before  | After |
| ------ | ----- |
!(Upload before screenshot)|(Upload after screenshot)|

Author: CrisBarreiro

app/src/main/java/com/duckduckgo/app/browser/WebViewCompatTestHelper.kt

@@ -80,6 +80,7 @@ class RealWebViewCompatTestHelper @Inject constructor(
         val sendMessageOnContextMenuOpen: Boolean,
         val sendMessagesUsingReplyProxy: Boolean,
         val useComplexScript: Boolean,
+        val useLargeScript: Boolean,
     )
 
     private var cachedConfig: WebViewCompatConfig? = null
@@ -100,6 +101,7 @@ class RealWebViewCompatTestHelper @Inject constructor(
                 sendMessageOnContextMenuOpen = webViewCompatFeature.sendMessageOnContextMenuOpen().isEnabled(),
                 sendMessagesUsingReplyProxy = webViewCompatFeature.sendMessagesUsingReplyProxy().isEnabled(),
                 useComplexScript = webViewCompatFeature.useComplexScript().isEnabled(),
+                useLargeScript = webViewCompatFeature.useLargeScript().isEnabled(),
             ).also {
                 cachedConfig = it
             }
@@ -115,6 +117,8 @@ class RealWebViewCompatTestHelper @Inject constructor(
             if (!webViewCompatFeature.self().isEnabled()) return@withContext null
             val scriptResourceId = if (config.useComplexScript) {
                 R.raw.webviewcompat_complex_test_script
+            } else if (config.useLargeScript) {
+                R.raw.webviewcompat_large_test_script
             } else {
                 R.raw.webviewcompat_test_script
             }

app/src/main/java/com/duckduckgo/app/browser/webview/WebViewCompatFeature.kt

@@ -53,6 +53,9 @@ interface WebViewCompatFeature {
 
     @Toggle.DefaultValue(DefaultFeatureValue.FALSE)
     fun useComplexScript(): Toggle
+
+    @Toggle.DefaultValue(DefaultFeatureValue.FALSE)
+    fun useLargeScript(): Toggle
 }
 
 data class WebViewCompatFeatureSettings(