Fix aul app socket handler

Fix aul app socket handler

After handling requests, AUL doesn't close the socket connection.
AMD monitors the socket connection. When the connection is closed,
AMD removes the status information of the application. This is a
fallback of the zombie process of the application.

Requires:
 - https://review.tizen.org/gerrit/#/c/platform/core/appfw/aul-1/+/265335/
 - https://review.tizen.org/gerrit/#/c/platform/core/appfw/amd/+/265818/
 - https://review.tizen.org/gerrit/#/c/platform/core/appfw/launchpad/+/265825/

Change-Id: Ia2b7e8ddaa2ced39862cb0fc085be1b08ff78d49
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>