Add new functions for retrieving running component context

Add new functions for retrieving running component context

Adds:
 - aul_comp_context_foreach()
 - aul_comp_context_foreach_usr()
 - aul_comp_context_get_app_id()
 - aul_comp_context_get_instance_id()
 - aul_comp_context_get_comp_id()
 - aul_comp_context_get_type()
 - aul_comp_context_get_pid()
 - aul_comp_context_get_status()
 - aul_comp_context_is_sub_comp()

Requires:
 - https://review.tizen.org/gerrit/#/c/platform/core/appfw/aul-1/+/203105/
 - https://review.tizen.org/gerrit/#/c/platform/core/appfw/amd/+/204068/

Change-Id: Ic1757e8ccea42339677ccffe444ca56efc362300
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>