Add feature flag for importing bookmarks using Google Takeout (#6706)

Task/Issue URL: https://app.asana.com/1/137249556945/task/1211197011841474?focus=true 

### Description
Defines a feature flag for being able to import bookmarks from Google

### Steps to test this PR
- QA optional

Author: CDRussell

autofill/autofill-api/src/main/java/com/duckduckgo/autofill/api/AutofillFeature.kt

@@ -115,6 +115,13 @@ interface AutofillFeature {
     @Toggle.DefaultValue(DefaultFeatureValue.FALSE)
     fun canImportFromGooglePasswordManager(): Toggle
 
+    /**
+     * Remote Flag that enables the ability to import bookmarks directly from Google Takeout
+     * @return `true` when the remote config has "canImportBookmarksFromGoogleTakeout" autofill sub-feature flag enabled
+     */
+    @Toggle.DefaultValue(DefaultFeatureValue.INTERNAL)
+    fun canImportBookmarksFromGoogleTakeout(): Toggle
+
     /**
      * Remote flag that enables the ability to support partial form saves. A partial form save is common with scenarios like:
      *  - a multi-step login form where username and password are entered on separate pages