enable init state at room join

protos/room.proto

@@ -12,7 +12,8 @@ message RoomCreateResponse {
 
 message RoomJoinRequest {
     uint32 RoomID = 1;
-    int32 RoomType = 2; // 0 = 游戏; 1=糖豆人
+    int32 RoomType = 2; // 0 = 游戏
+    map<string, bytes> Values = 3;
 }
 
 message RoomJoinResponse {