Provide tor ports using module

...ava/org/briarproject/bramble/api/plugin/TorConstants.java

...in/java/org/briarproject/bramble/plugin/PluginModule.java

...c/main/java/org/briarproject/bramble/plugin/TorPorts.java

...in/java/org/briarproject/bramble/plugin/TorPortsImpl.java

...n/java/org/briarproject/bramble/plugin/tor/TorPlugin.java

...main/java/org/briarproject/bramble/socks/SocksModule.java

...va/org/briarproject/bramble/plugin/tor/JavaTorPlugin.java

...va/org/briarproject/bramble/plugin/tor/UnixTorPlugin.java

...briarproject/bramble/plugin/tor/UnixTorPluginFactory.java