Issue 4029 - SharedPreference related crash on filter list fetch

src/org/adblockplus/sbrowser/contentblocker/ListedSubscriptionsPreferenceCategory.java

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 63 matching lines @@
 
   @Override
   protected View onCreateView(final ViewGroup parent)
   {
     return super.onCreateView(parent);
   }
 
   @Override
   protected void onAttachedToActivity()
   {
-    EngineService.startService(this.getContext(), this);
+    EngineService.startService(this.getContext().getApplicationContext(), this);
     super.onAttachedToActivity();
   }
 
   @Override
   public void onEngineCreated(final Engine engine, final boolean success)
   {
     this.engine = engine;
     this.isEnabledView = this.getTitleRes() == R.string.enabled_subscriptions;
 
     final HashMap<String, Locale> localeMap = new HashMap<String, Locale>();
@@ skipping 96 matching lines @@
   public boolean onPreferenceChange(final Preference preference, final Object newValue)
   {
     final String id = preference.getKey();
     final boolean enabled = ((Boolean) newValue).booleanValue();
 
     this.engine.changeSubscriptionState(id, enabled);
 
     return true;
   }
 }