Missed an entry in the copy constructor.

bug:15755597
Change-Id: Iee17ca88404a6a50258d204a12cd0c04cd15e34e
diff --git a/core/java/android/net/NetworkCapabilities.java b/core/java/android/net/NetworkCapabilities.java
index 835b269..53f9fcd 100644
--- a/core/java/android/net/NetworkCapabilities.java
+++ b/core/java/android/net/NetworkCapabilities.java
@@ -57,6 +57,7 @@
             mTransportTypes = nc.mTransportTypes;
             mLinkUpBandwidthKbps = nc.mLinkUpBandwidthKbps;
             mLinkDownBandwidthKbps = nc.mLinkDownBandwidthKbps;
+            mNetworkSpecifier = nc.mNetworkSpecifier;
         }
     }
 
@@ -449,7 +450,8 @@
      * </p>
      * The interpretation of this {@code String} is bearer specific and bearers that use
      * it should document their particulars.  For example, Bluetooth may use some sort of
-     * device id while WiFi could used ssid and/or bssid.  Cellular may use carrier spn.
+     * device id while WiFi could used SSID and/or BSSID.  Cellular may use carrier SPN (name)
+     * or Subscription ID.
      *
      * @param networkSpecifier An {@code String} of opaque format used to specify the bearer
      *                         specific network specifier where the bearer has a choice of