客户端rsa，冗余清理，bug修复，安卓build问题

Assets/scripts/roomSystem/playerMessagePrefab/playerMessagePrefab.cs

@@ -6,11 +6,7 @@ using UnityEngine;
 using UnityEngine.Networking;
 using UnityEngine.UI;
 
-#if !(UNITY_STANDALONE_WIN || UNITY_STANDALONE_LINUX || UNITY_STANDALONE_OSX || STEAMWORKS_WIN || STEAMWORKS_LIN_OSX)
-#define ROOMCHAT_DISABLE_STEAMWORKS
-#endif
-
-#if !ROOMCHAT_DISABLE_STEAMWORKS
+#if UNITY_STANDALONE_WIN || UNITY_STANDALONE_LINUX || UNITY_STANDALONE_OSX || STEAMWORKS_WIN || STEAMWORKS_LIN_OSX
 using Steamworks;
 #endif
 
@@ -271,7 +267,7 @@ public class playerMessagePrefab : MonoBehaviour
 
     private static async Task<Sprite> TryGetSteamAvatarSpriteAsync(string steamId)
     {
-#if ROOMCHAT_DISABLE_STEAMWORKS
+#if !(UNITY_STANDALONE_WIN || UNITY_STANDALONE_LINUX || UNITY_STANDALONE_OSX || STEAMWORKS_WIN || STEAMWORKS_LIN_OSX)
         return null;
 #else
         if (string.IsNullOrWhiteSpace(steamId) || !SteamManager.Initialized)