btm_pm_proc_mode_change() function

* Function btm_process_mode_change * Description This function is called when an HCI mode change event occurs. * Input Params hci_status - status of the event (HCI_SUCCESS if no errors) * hci_handle - connection handle associated with the change * mode - HCI_MODE_ACTIVE, HCI_MODE_HOLD, HCI_MODE_SNIFF, or HCI_MODE_PARK * interval - number of baseband slots (meaning depends on mode) * Returns none.