Merge "Clear the information of the underlying network" am: c232ead59f am: a86d00fab9 am: 30af21c6f9 am: 4af924d44d

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2455969

Change-Id: I5e57839038b30722f8ed38ffd034b6e8f5d8d267
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

services/core/java/com/android/server/connectivity/Vpn.java

@@ -3254,6 +3254,8 @@ public class Vpn {
             }
 
             mActiveNetwork = network;
+            mUnderlyingLinkProperties = null;
+            mUnderlyingNetworkCapabilities = null;
             mRetryCount = 0;
 
             startOrMigrateIkeSession(network);