Merge "Give a reflection example for installing the HTTP response cache."

 *         int maxStale = 60 * 60 * 24 * 28; // tolerate 4-weeks stale

 *         connection.addRequestProperty("Cache-Control", "max-stale=" + maxStale);

 * }</pre>

 *

 * <h3>Working With Earlier Releases</h3>

 * This class was added in Android 4.0 (Ice Cream Sandwich). Use reflection to

 * enable the response cache without impacting earlier releases: <pre>   {@code

 *       try {

 *           File httpCacheDir = new File(context.getCacheDir(), "http");

 *           long httpCacheSize = 10 * 1024 * 1024; // 10 MiB

 *           Class.forName("android.net.http.HttpResponseCache")

 *                   .getMethod("install", File.class, long.class)

 *                   .invoke(null, httpCacheDir, httpCacheSize);

 *       } catch (Exception httpResponseCacheNotAvailable) {

 *       }}</pre>

 */

public final class HttpResponseCache extends ResponseCache implements Closeable {