Wi-Fi: Add 6GHz band support in Soft-AP UI advanced options

Add 6GHz band to the drop-down menu of Soft-AP band selection switch to
allow users to start Soft-Ap in 6GHz band. This option will not be
displayed if the device is not supporting 6GHz band.

Change-Id: Id95c5213d9c99e791c106510d78132408cd28322
CRs-Fixed: 2569221
2 files changed