SoftBank Group is dispatching two executives to help Oyo Hotels, one of the largest start-ups in its portfolio, right its virus-stricken business in Japan, according to people familiar with the matter.Oyo Japan, a joint venture between the Indian online hotel operator and SoftBank’s domestic telecoms unit, is creating a six-member management oversight committee to deal with the situation, the people said, asking not be identified because the details are not yet public.SoftBank executive vice…