Fix the empty reason field in connectivity change intent.

The code set it to null instead of info.getReason.

Change-Id: I1b26ad040c23da7080dbfaeb5376181998115805
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index e07e4e2..963d23d 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -4503,7 +4503,7 @@
             info.setDetailedState(DetailedState.CONNECTED, null, info.getExtraInfo());
             sendConnectedBroadcast(info);
         } else {
-            info.setDetailedState(DetailedState.DISCONNECTED, null, info.getExtraInfo());
+            info.setDetailedState(DetailedState.DISCONNECTED, info.getReason(), info.getExtraInfo());
             Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
             intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info);
             intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType());