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/hello-jni/tests/src/com/example/HelloJni/HelloJniTest.java

@@ -0,0 +1,21 @@
+package com.example.HelloJni;
+
+import android.test.ActivityInstrumentationTestCase;
+
+/**
+ * This is a simple framework for a test of an Application.  See
+ * {@link android.test.ApplicationTestCase ApplicationTestCase} for more information on
+ * how to write and extend Application tests.
+ * <p/>
+ * To run this test, you can type:
+ * adb shell am instrument -w \
+ * -e class com.example.HelloJni.HelloJniTest \
+ * com.example.HelloJni.tests/android.test.InstrumentationTestRunner
+ */
+public class HelloJniTest extends ActivityInstrumentationTestCase<HelloJni> {
+
+    public HelloJniTest() {
+        super("com.example.HelloJni", HelloJni.class);
+    }
+
+}