qcacmn: Check for STA+GO restart only if SAP is active

In function policy_mgr_is_restart_sap_allowed, STA+SAP concurrency is
decided based on return status of policy_mgr_get_concurrency_mode.
It can happen, SAP adapter is opened. But hostapd_open and start_ap
is not done. Then, this api will return SAP bit true even though
SAP is not active. So, explicitly check if the SAP is active by
checking the SAP connection count along with the concurrency mode.
This can result in GO channel override with STA channel.
Hence check the sap and go mode connection count along
with the concurrency mode.

Change-Id: I672d503f34734d7e16175fedc685d2838e77d8f7
CRs-Fixed: 2405257