Create related APIs for PNO scan interval

Set PNO scan iterations and interval multiplier as variables and
get them from modules instead of hard coding.

Create related APIs for PNO scan iterations and interval multiplier.

Co-authored-by: Ziwen Xiao <Ziwen.Xiao@sony.com>

Test: manual test
Bug: 208172490
Change-Id: Iab7f80c9462e3facf15d8ec5a03b2f2560d48b4d
2 files changed