Add MineDigger.apk that works offline

sky/shell/android/org/domokit/sky/shell/SkyActivity.java

Index: sky/shell/android/org/domokit/sky/shell/SkyActivity.java
diff --git a/sky/shell/android/org/domokit/sky/shell/SkyActivity.java b/sky/shell/android/org/domokit/sky/shell/SkyActivity.java
index 2cbcccb49f6f60ad5afafb1b33e2418996b54723..00ffff3245f1a24994a4576154d8cd60dec3bf6c 100644
--- a/sky/shell/android/org/domokit/sky/shell/SkyActivity.java
+++ b/sky/shell/android/org/domokit/sky/shell/SkyActivity.java
@@ -10,6 +10,10 @@ import android.os.Bundle;
 import android.view.View;
 import android.view.WindowManager;
 
+import org.chromium.base.PathUtils;
+
+import java.io.File;
+
 /**
  * Base class for activities that use Sky.
  */
@@ -36,6 +40,8 @@ public class SkyActivity extends Activity {
         mView = new PlatformViewAndroid(this);
         setContentView(mView);
         mTracingController = new TracingController(this);
+
+        loadSnapshotIfAvailable();
     }
 
     /**
@@ -59,6 +65,13 @@ public class SkyActivity extends Activity {
         super.onBackPressed();
     }
 
+    private void loadSnapshotIfAvailable() {
+        File snapshot = new File(PathUtils.getDataDirectory(this), SkyApplication.SNAPSHOT);
+        if (snapshot.exists()) {
+            mView.loadSnapshot(snapshot.getPath());
+        }
+    }
+
     public void loadUrl(String url) {
         mView.loadUrl(url);
     }