A 3-year-old boycritically injured after accidentally shooting himself at a home in Newark last week has been upgraded to stable condition, an official said Monday The shooting took place at a residence on Wainwright Street at 5:47 p.m., Newark police said previously. The child was rushed to an area hospital with injuries from the self-inflicted gunshot wound. A police spokeswoman didn’t offer any additional information on Monday morning, Two other children were found unharmed at the home and a gun was recovered, officials said. It wasn’t immediately clear if any adults were home or if anyone …