Fix background management feature

Fix background management feature

While an application receives the AUL_SUSPEND event,
the allowed_bg value is changed to "false". AMD always
sends the AUL_SUSPEND event when the application is not
allowed to run in the background. And, the allowed_bg value
can be changed when the application receives the AUL_WAKE event.

- Requires
[aul] https://review.tizen.org/gerrit/#/c/83134/
[amd] https://review.tizen.org/gerrit/#/c/83044/

Change-Id: I941e0bfd92c8f4750f18f83f8cf5e50f13219bd7
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>