Bluetooth: Doc: RFCOMM PICS file

All mandatory and most of optional PTS tests are passing.
The only not supported optional tests are sending of Test,
RPN and RLS which is not required at the moment.

Change-Id: I5a92d30c0d44803baf6c705d86f2272e4e57fd18
Signed-off-by: Jaganath Kanakkassery <jaganathx.kanakkassery@intel.com>