New add/remove callback functions which give subscription id

New add/remove callback functions which give subscription id

Existing add/remove callback functions only can handle just one callback.
With these new interfaces and subscription id,
app can reference their multiple callbacks with subscription id.

[Version] Release 0.9.244
[Profile] Common
[Issue Type] Add interface

Change-Id: I6f59701811c9b9e034542f141d2fc800bddc6f99
Signed-off-by: Mok Jeongho <jho.mok@samsung.com>