Support server protocol parsing order without changing ProtocolType(options.proto)

One possible plan: define an order for every protocol,
```
TypeOrder[] = {
{PROTOCOL_BAIDU_STD , 100} ,
{PROTOCOL_STREAMING_RPC, 200},
}
```
and sort the protocol in handlers according to the number that followed. The interval between two protocol should be large enough to adapt to more protocols in future.

Start by reading the protocol handlers and the current ProtocolType(options.proto) parsing path. Evaluate the proposed TypeOrder mapping and how protocol order should be applied without changing that conversion. Done means protocol parsing follows the defined order while preserving the existing ProtocolType(options.proto) behavior.

Written by the indexing model from the issue text.