Wifi-hostapd: Handle the new freqlist attribute

A new attribute in hostapd.conf file (freqlist) is added to handle
the support of Wifi 6GHz band. This attribute uses the channel
frequencies in MHz instead of channel numbers due to the overlap of
channel numbers between 2.4/5GHz bands and 6GHz band.

Bug: 146186687
Bug: 139354972
Test: Manual: Double check hostapd.conf file is properly written.
Change-Id: I570ce5edda5c3c45fd7f9c317d1d556f0e7fd95b
1 file changed