Enhance http proxy support

Make it read proxys the correct way from CS so it works for all network types.
Add utility class for apache http client support.

bug:2700664
Change-Id: If81917b19b5f0636247a6519a1ec78bd8dbf3596

core/java/android/net/ConnectivityManager.java

@@ -264,6 +264,24 @@ public class ConnectivityManager
         }
     }
 
+    /** @hide */
+    public LinkProperties getActiveLinkProperties() {
+        try {
+            return mService.getActiveLinkProperties();
+        } catch (RemoteException e) {
+            return null;
+        }
+    }
+
+    /** @hide */
+    public LinkProperties getLinkProperties(int networkType) {
+        try {
+            return mService.getLinkProperties(networkType);
+        } catch (RemoteException e) {
+            return null;
+        }
+    }
+
     /** {@hide} */
     public boolean setRadios(boolean turnOn) {
         try {

core/java/android/net/IConnectivityManager.aidl

@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.net.LinkProperties;
 import android.net.NetworkInfo;
 import android.os.IBinder;
 
@@ -36,6 +37,10 @@ interface IConnectivityManager
 
     NetworkInfo[] getAllNetworkInfo();
 
+    LinkProperties getActiveLinkProperties();
+
+    LinkProperties getLinkProperties(int networkType);
+
     boolean setRadios(boolean onOff);
 
     boolean setRadio(int networkType, boolean turnOn);