Refactored OpenGL embedder that works on Android, Mac or Linux.

samples/android_sample/src/com/google/dartndk/DummyActivity.java

 package com.google.dartndk;
 
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.InputStream;
 import java.io.IOException;
 import java.io.OutputStream;
 
 import android.app.NativeActivity;
 import android.content.res.AssetManager;
 import android.os.Bundle;
 import android.util.Log;
 
 public class DummyActivity extends NativeActivity {
-  static {
-    // TODO(vsm): We should be able to get rid of this here
-    // and specify in xml instead.
-    System.loadLibrary("android_embedder");
-  }
-
   @Override
   public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     try {
       File localDir = getApplicationContext().getDir("dart", 0);
       String fileSystemPath = localDir.toString();
       String assetPath = "dart";
       AssetManager assetManager = getAssets();
       String[] files = assetManager.list(assetPath);
       byte[] buffer = new byte[1024];
       int read;
       for (String filename : files) {
         String dest = fileSystemPath + "/" + filename;
         Log.w("Dart", "Copying " + dest);
         InputStream in = assetManager.open(assetPath + "/" + filename);
         OutputStream out = new FileOutputStream(dest);
         while((read = in.read(buffer)) != -1){
           out.write(buffer, 0, read);
         }
         in.close();
         out.flush();
         ((FileOutputStream)out).getFD().sync();
         out.close();
       }
     } catch (IOException ex) {
     }
   }
 }