am cf05e318: am 2a1be1bc: Docs: Added declaration to code fragment Bug: 21030774

<p>Here is an example of a singleton class that provides {@code RequestQueue} and

{@code ImageLoader} functionality:</p>

<pre>private static MySingleton mInstance;

<pre>public class MySingleton {

    private static MySingleton mInstance;

    private RequestQueue mRequestQueue;

    private ImageLoader mImageLoader;

    private static Context mCtx;