Currently some channel list modifications for SAP and P2P GO mode
are present in policy_mgr_get_channel_list, whereas separate APIs for
SAP and P2P GO specific channel list modification are present, hence
keep all the mode specific channel list modifications in respective
APIs.
Change-Id: I393fbad12f29c761c1158fc5eb4ba0ebd6a660b6
CRs-Fixed: 3321108