Undeprecate android.net.ProxyInfo as it's still used.

It was deprecated as part of the Apache deprecation, however it is used
by ConnectivityManager.getLinkProperties() and .getDefaultProxy().
The alternatives (e.g. java.net.Proxy) do not offer a complete
replacement as they lack certain fields (e.g. PAC URL).

Bug:21274137
Change-Id: I99163a2611a738f337fb9907349ef6255dbed6d6
diff --git a/core/java/android/net/ProxyInfo.java b/core/java/android/net/ProxyInfo.java
index 2c90909..5f5e623 100644
--- a/core/java/android/net/ProxyInfo.java
+++ b/core/java/android/net/ProxyInfo.java
@@ -35,13 +35,7 @@
  *
  * Other HTTP stacks will need to obtain the proxy info from
  * {@link Proxy#PROXY_CHANGE_ACTION} broadcast as the extra {@link Proxy#EXTRA_PROXY_INFO}.
- *
- * @deprecated Please use {@link java.net.URL#openConnection}, {@link java.net.Proxy} and
- *     friends. The Apache HTTP client is no longer maintained and may be removed in a future
- *     release. Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a>
- *     for further details.
  */
-@Deprecated
 public class ProxyInfo implements Parcelable {
 
     private String mHost;