serialization: Reverse ParamsStream constructor order

Move parameter argument after stream argument so will be possible to accept
multiple variadic parameter arguments in the following commit.

Also reverse template parameter order for consistency.

src/net.cpp

@@ -199,7 +199,7 @@ static std::vector<CAddress> ConvertSeeds(const std::vector<uint8_t> &vSeedsIn)
     std::vector<CAddress> vSeedsOut;
     FastRandomContext rng;
     DataStream underlying_stream{vSeedsIn};
-    ParamsStream s{CAddress::V2_NETWORK, underlying_stream};
+    ParamsStream s{underlying_stream, CAddress::V2_NETWORK};
     while (!s.eof()) {
         CService endpoint;
         s >> endpoint;