Issue 3846 - Add notification for users using an old SBrowser version

src/org/adblockplus/sbrowser/contentblocker/engine/Engine.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 118 matching lines @@
     final Intent intent = new Intent(ACTION_OPEN_SETTINGS);
     final List<ResolveInfo> list = activityContext.getPackageManager()
         .queryIntentActivities(intent, 0);
     if (list.size() > 0)
     {
       activityContext.startActivity(intent);
     }
     return list.size() > 0;
   }
 
+  public static boolean hasCompatibleSBrowserInstalled(final Context activityContext)
+  {
+    try
+    {
+      return activityContext.getPackageManager()
+          .queryIntentActivities(new Intent(ACTION_OPEN_SETTINGS), 0).size() > 0;
+    }
+    catch (final Throwable t)
+    {
+      return false;
+    }
+  }
+
   void requestUpdateBroadcast()
   {
     this.lock();
     try
     {
       this.nextUpdateBroadcast = System.currentTimeMillis() + BROADCAST_COMBINATION_DELAY_MILLIS;
     }
     finally
     {
       this.unlock();
@@ skipping 465 matching lines @@
       Log.d(TAG, headers.toString());
       this.downloader.enqueueDownload(this.createDownloadURL(sub), sub.getId(), headers);
     }
   }
 
   public void connectivityChanged()
   {
     this.downloader.connectivityChanged();
   }
 }