RDKB-25911 RDKB-22958: XB7 WiFi Mode Support
RDKB-25911 RDKB-22958: XB7 WiFi Mode Support

Reason for change: Comcast Product Finalized WiFi Operating Modes for XB7s
Test Procedure:
1) Verify both modes can be set in Admin GUI for 2.4 & 5.0
2) Verify both Modes can be set in MSO GUI for 2.4 & 5.0
3) Verify GUIs do not display any other options.
4) Verify Both Modes Can be Set through WebPA, and TR-069
5) Verify No Regressions Introduced, run quick tests on Device Classes
Risks: Low

Signed-off-by: gmarshall <b4727817913ddfd8d0eab78cb69546e8ec57602a@cable.comcast.com>
(cherry picked from commit f856ba4b5574b7e3f53a3b308f90d553e10a9aff)
Change-Id: Iffc709a4b7756f2ae89a0514744ed587f920edd7

rdkcmf/rdkb-CcspWifiAgent,rdkcmf/rdkb-CcspWifiAgent,rdkcmf/rdkb-CcspWifiAgent