wifi: support 60GHz scan

Use WifiScanner.WIFI_BAND_60_GHZ for supporting getting
60GHz channels for scanning.

Bug: 147522434
Test: Manual - enable wifi and connect to an access point
Test: atest FrameworksWifiTests
Test: atest FrameworksWifiApiTests

Change-Id: I44078b3b8dd588b271b4eab64c0d104b4092d432
1 file changed