Pno channel culling: add frequencies to PnoNetworks

timestamped frequencies for each configured network are
obtained from mScanDetailCaches.
These frequencies are then linked to pno networks
to pass down for frequency culling.

Bug: 64312268
Test: compile
Test: turn wifi verbose logging on; connect to TP-LINK_B6C1_5G with
shield box open. Close shield box and wait for wifi to disconnect. Turn
screen off and verify print out with logcat:
WifiConfigManager: retrievePnoNetworkList "TP-LINK_B6C1_5G":[5785]
Change-Id: I716d17a32528b2f78c977b463792f01df6712894
2 files changed