AI 149005: Change from ndk to platform's ndk (pndk), the ability to make your own java callable libraries to c code.

BUG=1857858

Automated import of CL 149005

pdk/pndk/samples/samplejni/src/com/example/jniexample/JNIExample.java

@@ -0,0 +1,25 @@
+package com.example.jniexample;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.widget.TextView;
+
+public class JNIExample extends Activity {
+    /** Called when the activity is first created. */
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        TextView tv = new TextView(this);
+        int sum = Native.add(2, 3);
+        tv.setText("Native Code test: 2 + 3 = " + Integer.toString(sum));
+        setContentView(tv);
+    }
+}
+
+class Native {
+    static {
+        System.loadLibrary("native");
+    }
+
+    static native int add(int a, int b);
+}