In 2x2 DBS mode once STA/SAP change channel from 2.4Ghz to 5Ghz,
policy_mgr_get_current_pref_hw_mode_ptr never return
PM_SINGLE_MAC_UPGRADE to start the opportunistic timer to switch to
single mac mode.
Fix is to check and start opportunistic timer once connection info are
updated. Also start opportunistic timer before
check for SAP to change channel as when SAP change channel it should
stop opportunistic timer and set required HW mode.
If single mac mode is required after channel switch it will start
opportunistic timer again in channel switch callback.
Change-Id: Id6bbc7ea51ba8147e517e7e7bf2b14931c95ea44
CRs-Fixed: 2419645
bfaebe3372