Add a null check in ConnectivityManagerDelegate.getNetworkState

net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.net;
 
 import static android.net.ConnectivityManager.TYPE_VPN;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN;
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
@@ skipping 76 matching lines @@
             return getNetworkState(mConnectivityManager.getActiveNetworkInfo());
         }
 
         /**
          * Returns connection type and status information about |network|.
          * Only callable on Lollipop and newer releases.
          */
         @TargetApi(Build.VERSION_CODES.LOLLIPOP)
         NetworkState getNetworkState(Network network) {
             final NetworkInfo networkInfo = mConnectivityManager.getNetworkInfo(network);
-            if (networkInfo.getType() == TYPE_VPN) {
+            if (networkInfo != null && networkInfo.getType() == TYPE_VPN) {
                 // When a VPN is in place the underlying network type can be queried via
                 // getActiveNeworkInfo() thanks to
                 // https://android.googlesource.com/platform/frameworks/base/+/d6a7980d
                 return getNetworkState();
             }
             return getNetworkState(networkInfo);
         }
 
         /**
          * Returns connection type and status information gleaned from networkInfo.
@@ skipping 779 matching lines @@
      */
     @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     @VisibleForTesting
     static int networkToNetId(Network network) {
         // NOTE(pauljensen): This depends on Android framework implementation details.
         // Fortunately this functionality is unlikely to ever change.
         // TODO(pauljensen): When we update to Android M SDK, use Network.getNetworkHandle().
         return Integer.parseInt(network.toString());
     }
 }