[rdkb][common][app][Refactor wifi-test-tool]

[Description]
Refactor wifi-test-tool.
1. Use wifi_setRadioOperatingParameters to set most radio config. If we disable the radio, we would not set other hostapd config.
2. Use wifi_createVAP to set most vap config.

[Release-log]
N/A

Change-Id: I5070353a916fb390cc152e32d142684d0bd3b80e
1 file changed