Optimize the scanning interval of schedule scan

Optimize the scanning interval of schedule scan

The peak of current is 80mA for schedule scan. In the past, the
interval of schedule scan is 20s, it would increase the average
current by 20mA.

This change is to optimize the scanning interval so that the
average current can be reduced to less than 1mA
Min_Period: 48s
Max_Period: 500s
Exponent: 10
Step count: 7

48s, 48s, 48s, 48s, 48s, 48s, 48s, 480s,..., 480s, ...

Change-Id: Ie0535267e531fc84ce49f9130774b1c575081a1d
Signed-off-by: sunyue5 <sunyue5@motorola.com>
Reviewed-on: https://gerrit.mot.com/1337433
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Hua Tan <tanhua1@motorola.com>
Submit-Approved: Jira Key