shared/gatt-db: Generate database hash

shared/gatt-db: Generate database hash

This use bt_crypto_hash (AES-CMAC) to generate a database hash
using the content of the attribute:

In ascending order of attribute handles, starting with the first handle,
concatenate the fields Attribute Handle, Attribute Type, and Attribute
Value if the attribute has one of the following types:
«Primary Service», «Secondary Service», «Included Service»,
«Characteristic», or «Characteristic Extended Properties», concatenate
the fields Attribute Handle and Attribute Type if the attribute has one
of the following types: «Characteristic User Description»,
«Client Characteristic Configuration»,
«Server Characteristic Configuration», «Characteristic Format», or
«Characteristic Aggregate Format», and ignore the attribute if it has
any other type (such attributes are not part of the concatenation).

Change-Id: If27ed2e2a6bfbf2549492061c928cf64afbaf10e
Signed-off-by: himanshu <h.himanshu@samsung.com>