Kernel: Make sockets use AK::Time

Author: https://github.com/BenWiederhake
Commit: 5c15ca7b84
Pull-request: https://github.com/SerenityOS/serenity/pull/5323
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/bgianfo

Kernel/Net/TCPSocket.h

@@ -202,7 +202,7 @@ private:
         u32 ack_number { 0 };
         ByteBuffer buffer;
         int tx_counter { 0 };
-        timeval tx_time { 0, 0 };
+        Time tx_time {};
     };
 
     Lock m_not_acked_lock { "TCPSocket unacked packets" };