[rdkb][common][app][Fix tdk test issue]

[Description]
Fix tdk test issue.
1. Refactor wifi_down to disable all radio.
2. Refactor factoryReset.
3. Refactor setApWpsEnable.
4. Refactor setApScanFilter.
5. Refactor getRadioChannelsInUse for output format.

[Release-log]
N/A

Change-Id: I043b2f8d9b5ff115132929061696e35b78f8c328
1 file changed
tree: 43d0bdefb02029c7fe2f58f807c9c6f79628a5a9
  1. src/