camera: try to automatically handle AcquisitionFrameRate/Abs
camera: try to automatically handle AcquisitionFrameRate/Abs

Like what is done for ExposureTime.

AravisProject/aravis,AnilRamachandran/aravis,AnilRamachandran/aravis,AravisProject/aravis,AnilRamachandran/aravis,AravisProject/aravis,AravisProject/aravis,AnilRamachandran/aravis,AravisProject/aravis,AnilRamachandran/aravis