1. Fix wrong reason code in 'WIFI_EVENT_AP_STADISCONNECTED' event
2. cleanup in softAP for disconnecting connected station
3. Update examples to display reason while processing WIFI_EVENT_AP_STADISCONNECTED event
This commit updates the visibility of various header files and cleans up
some unnecessary inclusions. Also, this commit removes certain header
include paths which were maintained for backward compatibility.
This commit removes the usage of all legacy FreeRTOS data types that
are exposed via configENABLE_BACKWARD_COMPATIBILITY. Legacy types can
still be used by enabling CONFIG_FREERTOS_ENABLE_BACKWARD_COMPATIBILITY.