Fix: background gatt connection is not working

Fix: background gatt connection is not working

[Model] All
[BinType] AP
[Customer] OPEN

[Issue#] N/A
[Request] Internal
[Occurrence Version] N/A

[Problem] background gatt connection is not working
[Cause & Measure] If auto_connect is true, initiate background auto connection
 and reply dbus to bt-service
[Checking Method] background gatt auto connection

[Team] Convergence BT
[Developer] Injun Yang
[Solution company] Samsung
[Change Type] Specification change

Change-Id: Ie9f0887774a9e46a26a209d11cbca70298379489