Issue 4760 - Change Ad blocking settings text

mobile/android/base/resources/xml-v11/preferences_abb_abp.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- This Source Code Form is subject to the terms of the Mozilla Public
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
                   xmlns:gecko="http://schemas.android.com/apk/res-auto" >
 
     <org.adblockplus.browser.AbpCheckBoxPreference android:key="android.not_a_preference.adblockbrowser.apiAdblockPlusEnabled"
         android:title="@string/abb_pref_category_abp"
         android:summary="@string/abb_pref_category_abp_summary"
         android:defaultValue="true"
         android:persistent="false" />
 
     <PreferenceCategory android:title="@string/abb_pref_category_blocking"
         android:dependency="android.not_a_preference.adblockbrowser.apiAdblockPlusEnabled" >
-        <PreferenceScreen android:title="@string/abb_pref_category_adblocking"
-                          android:summary="@string/abb_pref_category_adblocking_summary"
+        <PreferenceScreen android:title="@string/abb_pref_category_filters"

[Felix Dahlke, 2017/01/02 16:48:20]

I'd rather call this "adblocking_languages" or just "languages" than "filters"
because this is about selecting which languages to do ad blocking for. "filters"
is very generic.

+                          android:summary="@string/abb_pref_category_filters_summary"
                           android:fragment="org.mozilla.gecko.preferences.GeckoPreferenceFragment" >
             <extra android:name="resource"
                    android:value="preferences_abb_adblocking" />
         </PreferenceScreen>
         <PreferenceScreen android:title="@string/abb_pref_category_more_blocking"
                           android:summary="@string/abb_pref_category_more_blocking_summary"
                           android:fragment="org.mozilla.gecko.preferences.GeckoPreferenceFragment" >
             <extra android:name="resource"
                    android:value="preferences_abb_more_blocking" />
         </PreferenceScreen>
     </PreferenceCategory>
 
     <PreferenceCategory android:title="@string/abb_pref_category_exceptions"
         android:dependency="android.not_a_preference.adblockbrowser.apiAdblockPlusEnabled" >
         <PreferenceScreen android:title="@string/abb_pref_category_acceptable_ads"
                           android:summary="@string/abb_pref_category_acceptable_ads_summary" 
                           android:fragment="org.mozilla.gecko.preferences.GeckoPreferenceFragment" >
             <extra android:name="resource"
                    android:value="preferences_abb_abp_acceptable_ads" />
         </PreferenceScreen>
 <!-- Commented out until implemented
         <PreferenceScreen android:title="@string/abb_pref_category_whitelisted_sites"
                           android:summary="@string/abb_pref_category_whitelisted_sites_summary" >
         </PreferenceScreen>
 -->
     </PreferenceCategory>
 
 </PreferenceScreen>