client: Add gatt.clone command

client: Add gatt.clone command

This adds clone command to gatt submenu which can be use to clone
services as follow:

Clone all services from the connected device:
> gatt.clone

Clone a given service
> gatt.select-attribute <attribute/uuid>
> gatt.clone

In either case there is a prompt to confirm since this may add a lot of
service the user must confim before proceding.

Then finally:

> gatt.register-application

Change-Id: Ia3298b1f1a52c04b0dad34a7b794c9f177c8978d
Signed-off-by: himanshu <h.himanshu@samsung.com>