Support multiple instance launch

Support multiple instance launch

- Add new APIs and new internal keys
aul_app_get_running_app_instance_info(): Retrieves the app instance info
aul_svc_set_instance_id: Sets the instance ID
aul_svc_get_instance_id: Gets the instance ID

- Requires:
[application] https://review.tizen.org/gerrit/#/c/108805/
[app-manager] https://review.tizen.org/gerrit/#/c/110114/
[amd] https://review.tizen.org/gerrit/#/c/109746/
[rua] https://review.tizen.org/gerrit/#/c/109906/

Change-Id: I1cc83fe8a82b6df09a3cfa551b9861247040da27
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>