Atom: add more information to BluetootSocketConnectionStateChanged

* Add server_port field to track the server port number of a socket
* Add socket_role field to track whether the socket is a server listener
  or a connection socket
* Add uid field to track the owner of the socket

Bug: 112969790
Test: make, test drive with statsd
Change-Id: I0c86b724c748844009b8120befd454fb96137a61