Currently, unsafe channels are avoided when SAP restart happens.
If WMI_COEX_FIX_CHANNEL_CAPABILITIES is advertised by firmware
and if the SAP is started in a fixed channel, don't restart even
if the current operating channel is unsafe.
Change-Id: I5f7d632bcc00a1b5351dad64aca0ce16f1057537
CRs-Fixed: 3381394