Detection stopped event updated with detection cycle mid/end

Detection stopped event updated with detection cycle mid/end

Every one minute we receive environmental presence/absence and detection
stopped calls. Earlier _uam_core_handle_detection_stopped() sends
detection_stopped_event which then called __ua_user_state_clean() and
cleaned recorded WIFI/BLE data in CAPI. Hence it cannot be used for
next one minute cycles of environmental sensors.

Change-Id: Ibad4cbf5e05840b31a593984a0f00f1ca4b72ae9
Signed-off-by: Lokesh <l.kasana@samsung.com>