Log UID and PID of legacy route requests.

Bug: 23801105
Change-Id: I1722af0424f5b9bbd7276b77ce1571842fa541b3
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index a7e6f11..75dda9c 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -1366,7 +1366,8 @@
                 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface);
             }
         }
-        if (DBG) log("Adding " + bestRoute + " for interface " + bestRoute.getInterface());
+        if (DBG) log("Adding legacy route " + bestRoute +
+                " for UID/PID " + uid + "/" + Binder.getCallingPid());
         try {
             mNetd.addLegacyRouteForNetId(netId, bestRoute, uid);
         } catch (Exception e) {