preferences.xml: Add checkbox preference for filtering with ListaSpam scraper

Author: adamff-dev

app/src/main/res/xml/preferences.xml

@@ -16,6 +16,13 @@
         android:summary="@string/pref_filter_lista_spam_summary"
         android:defaultValue="true" />
 
+    <CheckBoxPreference
+        app:iconSpaceReserved="false"
+        android:key="pref_filter_lista_spam_scraper"
+        android:title="@string/pref_filter_lista_spam_scraper_title"
+        android:summary="@string/pref_filter_lista_spam_scraper_summary"
+        android:defaultValue="true" />
+
     <CheckBoxPreference
         app:iconSpaceReserved="false"
         android:key="pref_filter_responder_o_no"