Guarantee that PAC Local Proxy owns Port

This changes the PAC support to not broadcast the Proxy information until
the Local Proxy has started up and successfully bound to a port so that
the local proxy information can be guaranteed to be owned by the proxy.

Bug: 10459877
Change-Id: I175cd3388c758c55e341115e4a8241884b90d633
diff --git a/services/java/com/android/server/ConnectivityService.java b/services/java/com/android/server/ConnectivityService.java
index 4e3faca..47f18e7 100644
--- a/services/java/com/android/server/ConnectivityService.java
+++ b/services/java/com/android/server/ConnectivityService.java
@@ -114,7 +114,6 @@
 import com.android.internal.telephony.PhoneConstants;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.internal.util.XmlUtils;
-import com.android.net.IProxyService;
 import com.android.server.am.BatteryStatsService;
 import com.android.server.connectivity.DataConnectionStats;
 import com.android.server.connectivity.Nat464Xlat;
@@ -3471,7 +3470,7 @@
 
     private void sendProxyBroadcast(ProxyProperties proxy) {
         if (proxy == null) proxy = new ProxyProperties("", 0, "");
-        mPacManager.setCurrentProxyScriptUrl(proxy);
+        if (mPacManager.setCurrentProxyScriptUrl(proxy)) return;
         if (DBG) log("sending Proxy Broadcast for " + proxy);
         Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION);
         intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING |