Issue 5556 - make C++ implementation of LogSystem manageable only by JsEngine

libadblockplus-android/src/org/adblockplus/libadblockplus/android/AndroidLogSystem.java

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present 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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 package org.adblockplus.libadblockplus.android;
 
 import org.adblockplus.libadblockplus.LogSystem;
 
 import android.util.Log;
 
-public class AndroidLogSystem extends LogSystem
+public class AndroidLogSystem implements LogSystem
 {
   private static int abpLogLevelToAndroid(final LogLevel level)
   {
     switch (level)
     {
       default:
       case TRACE:
       case LOG:
         return Log.VERBOSE;
       case INFO:
         return Log.INFO;
       case WARN:
         return Log.WARN;
       case ERROR:
         return Log.ERROR;
     }
   }
 
   @Override
   public void logCallback(final LogLevel level, final String message, final String source)
   {
     Log.println(abpLogLevelToAndroid(level), source, message);
   }
 }