Trap SecurityException with preemptive mobile activation

Older android versions require additional permission (as a bug) which we
do not want to request. Instead we will trap the exception and ignore
the failure.

Fixed: 1119435
Change-Id: I6377f4e2f910a5a8ab37af12235548420934f8b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2364749
Commit-Queue: Ken Rockot <rockot@google.com>
Commit-Queue: Zhongyi Shi <zhongyi@chromium.org>
Reviewed-by: Zhongyi Shi <zhongyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799802}

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

@@ -47,12 +47,18 @@ public class NetworkActivationRequest extends NetworkCallback {
         mNativePtr = nativePtr;
         if (mConnectivityManager == null) return;
 
+        try {
             mConnectivityManager.requestNetwork(
                     new NetworkRequest.Builder()
                             .addTransportType(transportType)
                             .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
                             .build(),
                     this);
+        } catch (SecurityException e) {
+            // On some older devices the CHANGE_NETWORK_STATE permission is not sufficient to allow
+            // use of {@code requestNetwork} above and it will throw a SecurityException. Do nothing
+            // in this case.
+        }
     }
 
     /**