Router: more type arguments, for each

router/java/src/net/i2p/router/ClientTunnelSettings.java

router/java/src/net/i2p/router/PersistentKeyRing.java

router/java/src/net/i2p/router/TunnelPoolSettings.java

router/java/src/net/i2p/router/transport/UPnP.java

...a/src/net/i2p/router/transport/ntcp/NTCPSendFinisher.java

...c/net/i2p/router/tunnel/pool/ExploratoryPeerSelector.java

router/java/src/net/i2p/router/tunnel/pool/TunnelPool.java