Show IP address of current active link instead of just the WiFi IP address.

Bug: 5359194

Show "Unavailable" only if there's no active link.

Change-Id: I82ba6bda3a08ea84080a8d8cda331f22d7c7a2bd
diff --git a/src/com/android/settings/Utils.java b/src/com/android/settings/Utils.java
index ac6cb64..f28500e 100644
--- a/src/com/android/settings/Utils.java
+++ b/src/com/android/settings/Utils.java
@@ -306,6 +306,23 @@
         ConnectivityManager cm = (ConnectivityManager)
                 context.getSystemService(Context.CONNECTIVITY_SERVICE);
         LinkProperties prop = cm.getLinkProperties(ConnectivityManager.TYPE_WIFI);
+        return formatIpAddresses(prop);
+    }
+
+    /**
+     * Returns the default link's IP addresses, if any, taking into account IPv4 and IPv6 style
+     * addresses.
+     * @param context the application context
+     * @return the formatted and comma-separated IP addresses, or null if none.
+     */
+    public static String getDefaultIpAddresses(Context context) {
+        ConnectivityManager cm = (ConnectivityManager)
+                context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        LinkProperties prop = cm.getActiveLinkProperties();
+        return formatIpAddresses(prop);
+    }
+
+    private static String formatIpAddresses(LinkProperties prop) {
         if (prop == null) return null;
         Iterator<InetAddress> iter = prop.getAddresses().iterator();
         // If there are no entries, return null