LE CoC: Add unit test for L2CAP_LE type socket connection

LE CoC: Add unit test for L2CAP_LE type socket connection

This patch adds the following unit test for L2CAP_LE type socket:
- create socket
- destroy socket
- listen socket
- connect socket
- Accept and Reject socket connection
- get psm of listening socket

To avoid build conflict please merge this patch after merging framework
patch: (Change-Id: Icf4d8a51acc444765a9b61224a3a5d3fd26bfa65)

Change-Id: Ic6adf2738155b3334ce77dbff149b3e04a78a94f
Signed-off-by: Ayush Garg <ayush.garg@samsung.com>
Signed-off-by: Anuj Jain <anuj01.jain@samsung.com>