Mark PNSE-throwing methods in System.Net.NetworkInformation.IPGlobalP…

…roperties as unsupported on Android (#50855)

Part of #47911.  

This is to annotate the following methods in System.Net.NetworkInformation.IPGlobalProperties as unsupported on Android since they throw PNSE:  

- GetActiveTcpConnections();
- GetActiveTcpListeners();
- GetActiveUdpListeners();

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

@@ -130,8 +130,11 @@ public abstract partial class IPGlobalProperties
         public abstract System.Net.NetworkInformation.NetBiosNodeType NodeType { get; }
         public virtual System.IAsyncResult BeginGetUnicastAddresses(System.AsyncCallback? callback, object? state) { throw null; }
         public virtual System.Net.NetworkInformation.UnicastIPAddressInformationCollection EndGetUnicastAddresses(System.IAsyncResult asyncResult) { throw null; }
+        [System.Runtime.Versioning.UnsupportedOSPlatform("android")]
         public abstract System.Net.NetworkInformation.TcpConnectionInformation[] GetActiveTcpConnections();
+        [System.Runtime.Versioning.UnsupportedOSPlatform("android")]
         public abstract System.Net.IPEndPoint[] GetActiveTcpListeners();
+        [System.Runtime.Versioning.UnsupportedOSPlatform("android")]
         public abstract System.Net.IPEndPoint[] GetActiveUdpListeners();
         public abstract System.Net.NetworkInformation.IcmpV4Statistics GetIcmpV4Statistics();
         public abstract System.Net.NetworkInformation.IcmpV6Statistics GetIcmpV6Statistics();

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

@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Runtime.Versioning;
 using System.Threading.Tasks;
 
 namespace System.Net.NetworkInformation
@@ -19,16 +20,19 @@ public static IPGlobalProperties GetIPGlobalProperties()
         /// <summary>
         /// Gets the Active Udp Listeners on this machine.
         /// </summary>
+        [UnsupportedOSPlatform("android")]
         public abstract IPEndPoint[] GetActiveUdpListeners();
 
         /// <summary>
         /// Gets the Active Tcp Listeners on this machine.
         /// </summary>
+        [UnsupportedOSPlatform("android")]
         public abstract IPEndPoint[] GetActiveTcpListeners();
 
         /// <summary>
         /// Gets the Active Udp Listeners on this machine.
         /// </summary>
+        [UnsupportedOSPlatform("android")]
         public abstract TcpConnectionInformation[] GetActiveTcpConnections();
 
         /// <summary>