Support instance termination

Support instance termination

From Tizen 5.5, the component-based application is supported. The
component-based application has many components. We have to support
to terminate each instance.
When a developer calls aul_svc_subapp_terminate_request(), the daemon
terminates the launched instance.

Adds:
 - aul_terminate_instance_async()
 - aul_terminate_instance_async_for_uid()
 - aul_svc_subapp_termiante_request()

Change-Id: I14cb407e9af9f291fdf746f7dcf189e540ab0838
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>