If AP1 on 2G unsafe channel (no valid 2g channel so can't move),
STA+AP2 on 5G unsafe channel doing SCC, when STA disconnect, 5G AP2
is expected to restart to another 5G safe channel, but 2G AP1 will
also be selected to restart to another 2g safe channel (not in acs
range), which is not supported to switch to different channel at same
time.
To fix this issue, save last disconnected sta channel frequency in
policy manager context, and find the AP which is doing SCC with this
sta, and restart this SAP to safe channel.
To avoid possible OOB write warning, enlarge the input array buffer
of policy_mgr_get_mode_specific_conn_info().
Change-Id: If6ddd889cc0fd8b00796d42e6aa4d1a98b6b1070
CRs-Fixed: 3145226
1135c6caf9