Fix filtered exceptions when checking for ip forwarding

src/libraries/System.Net.NetworkInformation/src/System/Net/NetworkInformation/LinuxIPv4InterfaceProperties.cs

@@ -52,8 +52,7 @@ private bool GetIsForwardingEnabled()
                 {
                     return StringParsingHelpers.ParseRawIntFile(paths[i]) == 1;
                 }
-                catch (IOException) { }
-                catch (UnauthorizedAccessException) { }
+                catch (NetworkInformationException ex) when (ex.InnerException is IOException or UnauthorizedAccessException) { }
             }
 
             return false;