Frameworks: Fix ap list issue while wifi turns on

Decrease the sleep time to resolve the synchronization issue
which happens between wpa_supplicant and Wifimonitor thread
when wifi turns on.

CRs-Fixed: 673012

Change-Id: I4e2414301ace26a26351b6c1345e1ff6e7ab49a9
Tunning max allowed background services

The serialize running of background services feature
delay some services startup when system bootup, and
lead some abnormal behaivor at the early of system startup.
Tunning will be disabled after system complete bootup.

Change-Id: I834607d9156253bee13848586a8136e24760fdf4