Wifi: Trigger Selective Scan based on saved profile

This is a new requirement intended to decrease the reconnection
time with saved profiles when Wifi is turn On. The approach
here is to prepare a channel list based on the saved profile
and issue this selective frequency scans for the first two scans.
Third scan onwards it issues a full scan.

CRs-Fixed: 1070374
Change-Id: I72edd47aed7741745d8ebf663e53192be3405e49
4 files changed
tree: fb50d0620ac913e092e4e6746100185c1f29c5bc
  1. service/
  2. tests/