Is there an API to get the dfu image size? We use this in combination with s_dfu_settings.progress.firmware_image_offset to show a progress bar on the gui. In the past, we have modified nrf_dfu_req_handler to access m_firmware_size_req as the total image size to be written. I was hoping when the DFU was overhauled in SDK 15 that there would be an api to access this info, especially with the new observer callback. Did I miss the API or do I need to modify the SDK to get this info?
