LE CoC: Add HAL implementation for L2CAP_LE type socket

LE CoC: Add HAL implementation for L2CAP_LE type socket

This patch adds following
- Implement HAL interface to create and remove L2CAP_LE Socket
- Implement HAL interface to listen and connect to L2CAP_LE Socket
- Support for L2CAP_LE socket authorization

To avoid build conflict please merge this patch after merging bluez
patch: (Change-Id: I7f4f6ba5fe49b6d3fa05bfbc3a1b2bfdd269c6bb)

Change-Id: Ifd4297f77a327ded5b7f51a3bc56c72f1416c9f1
Signed-off-by: Ayush Garg <ayush.garg@samsung.com>
Signed-off-by: Anuj Jain <anuj01.jain@samsung.com>