streaming: type arguments, unused imports

...reaming/java/src/net/i2p/client/streaming/Connection.java

.../java/src/net/i2p/client/streaming/ConnectionHandler.java

.../java/src/net/i2p/client/streaming/ConnectionOptions.java

...src/net/i2p/client/streaming/ConnectionPacketHandler.java

...ing/java/src/net/i2p/client/streaming/MessageHandler.java

...java/src/net/i2p/client/streaming/MessageInputStream.java

...ming/java/src/net/i2p/client/streaming/PacketHandler.java

...reaming/java/src/net/i2p/client/streaming/PcapWriter.java

...g/java/src/net/i2p/client/streaming/SchedulerChooser.java

...ming/java/src/net/i2p/client/streaming/SchedulerImpl.java

...junit/net/i2p/client/streaming/ConnectInactivityTest.java

...java/test/junit/net/i2p/client/streaming/ConnectTest.java

...st/junit/net/i2p/client/streaming/ConnectTimeoutTest.java

...va/test/junit/net/i2p/client/streaming/EchoLargeTest.java

...unit/net/i2p/client/streaming/MessageInputStreamTest.java