Azure RTOS 6.1.4

This release includes the following modifications:

Added host device configuration activate/deactivate support, files added/modified:
    ux_host_stack_configuration_interface_scan.c
    ux_host_stack_device_configuration_activate.c
    ux_host_stack_device_configuration_deactivate.c

    ux_api.h
    ux_host_stack.h
    ux_host_stack_class_interface_scan.c
    ux_host_stack_configuration_set.c
    ux_host_stack_device_configuration_reset.c
    ux_host_stack_device_configuration_select.c
    ux_host_stack_device_remove.c
    ux_host_stack_hnp_polling_thread_entry.c

Added Host Printer GET_DEVICE_ID support, files modified/added:
    ux_api.h
    ux_host_class_printer_device_id_get.c
    ux_host_class_printer_name_get.c

Added Host Printer non-zero interface support, files modified:
    ux_host_class_printer_name_get.c
    ux_host_class_printer_soft_reset.c
    ux_host_class_printer_status_get.c

Added host string descriptor get support, files modified/added:
    ux_api.h
    ux_host_stack.h
    ux_host_stack_device_string_get.c

Added host change callback events for physical device connection/disconnection, files modified:
    ux_api.h
    ux_host_stack.h
    ux_host_stack_device_remove.c
    ux_host_stack_new_device_create.c
    ux_host_stack_rh_device_insertion.c
    ux_host_class_hub_port_change_connection_process.c

Added disconnection check in host enumeration retries, files modified:
    ux_host_stack_rh_device_insertion.c
    ux_host_class_hub_port_change_connection_process.c

Fixed host CDC ECM ZLP issue, file modified:
    ux_host_class_cdc_ecm_transmission_callback.c

Added compile option for using packet pool from NetX, files modified:
    ux_host_class_cdc_ecm.h
    ux_host_class_cdc_ecm_activate.c
    ux_host_class_cdc_ecm_deactivate.c
    ux_host_class_cdc_ecm_thread.c
    ux_user_sample.h