Added the portForwardL function in SshPlugin.java to interface with the JSch library.
Added else if statement to onMethodCall in SshPlugin.java to handle new function.
Added the portForwardL function in the ssh.dart to interface with the portForwardL function in SshPlugin.java
Added the portForwardL function in SshPlugin.java to interface with the JSch library. Added else if statement to onMethodCall in SshPlugin.java to handle new function. Added the portForwardL function in the ssh.dart to interface with the portForwardL function in SshPlugin.java