During full scan only 2.4Ghz channels are printed.
Along with 2.4Ghz channels print 5Ghz channels.
so, use policy_mgr_get_connected_roaming_vdev_band_mask()
instead of policy_mgr_get_connected_vdev_band_mask()
After Roam result candidate or currently connected
AP bssid is not printed. so, printed candidate or
currently connected AP bssid by changing logic
Change-Id: I800ebdc033480b93150bdeb00a900c373ba333dc
CRs-Fixed: 3185092