Log outbound proxy address if exists for debugging.

Change-Id: I2d2dffe3536e674b6956164c400e397c2f00f212
diff --git a/services/java/com/android/server/sip/SipSessionGroup.java b/services/java/com/android/server/sip/SipSessionGroup.java
index 8019bfa..70ff9ea 100644
--- a/services/java/com/android/server/sip/SipSessionGroup.java
+++ b/services/java/com/android/server/sip/SipSessionGroup.java
@@ -123,6 +123,7 @@
         properties.setProperty("javax.sip.STACK_NAME", getStackName());
         String outboundProxy = myself.getProxyAddress();
         if (!TextUtils.isEmpty(outboundProxy)) {
+            Log.v(TAG, "outboundProxy is " + outboundProxy);
             properties.setProperty("javax.sip.OUTBOUND_PROXY", outboundProxy
                     + ":" + myself.getPort() + "/" + myself.getProtocol());
         }