Added ChannelId and ServerId to IDiscordVoiceClient

src/Discord.Net/Audio/IDiscordVoiceClient.cs

@@ -4,6 +4,8 @@ namespace Discord.Audio
 {
 	public interface IDiscordVoiceClient
 	{
+		long? ChannelId { get; }
+		long? ServerId { get; }
 		IDiscordVoiceBuffer OutputBuffer { get; }
 
 		Task JoinChannel(long channelId);

src/Discord.Net/DiscordWSClient.Voice.cs

@@ -7,6 +7,8 @@ namespace Discord
 	public partial class DiscordWSClient : IDiscordVoiceClient
 	{
 		IDiscordVoiceBuffer IDiscordVoiceClient.OutputBuffer => _voiceSocket.OutputBuffer;
+		long? IDiscordVoiceClient.ServerId => _voiceSocket.CurrentServerId;
+		long? IDiscordVoiceClient.ChannelId => _voiceSocket.CurrentChannelId;
 
 		async Task IDiscordVoiceClient.JoinChannel(long channelId)
 		{