API to enable/disable PNO scan feature

Allow caller to control whether PNO scan is active.

Test: atest com.android.server.wifi
Bug: 282821585
Change-Id: Ia6499a46881c808eb693f33194cffbcdf4075692
Merged-In: Ia6499a46881c808eb693f33194cffbcdf4075692
(cherry picked from commit d16d72ba5ff0f4355dde5e292956917cd1b38bd4)
8 files changed