Copy platforms and samples from ndk/ source tree.

The idea is to allow developing the NDK in the open, while
having the platforms and samples under a private branch until
the corresponding release are open-sourced.

Change-Id: Iee995fb6c4d3ee1387dea7486e599e079c9e4c6d

ndk/samples/two-libs/src/com/example/twolibs/TwoLibs.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.example.twolibs;
+
+import android.app.Activity;
+import android.widget.TextView;
+import android.os.Bundle;
+
+public class TwoLibs extends Activity
+{
+    /** Called when the activity is first created. */
+    @Override
+    public void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+
+        TextView  tv = new TextView(this);
+        int       x  = 1000;
+        int       y  = 42;
+
+        // here, we dynamically load the library at runtime
+        // before calling the native method.
+        //
+        System.loadLibrary("twolib-second");
+
+        int  z = add(x, y);
+
+        tv.setText( "The sum of " + x + " and " + y + " is " + z );
+        setContentView(tv);
+    }
+
+    public native int add(int  x, int  y);
+}