By Anton Bridge TOKYO (Reuters) – Japanese technology investor SoftBank (TYO:) Group is expected to report a 287 billion yen ($1.87 billion) quarterly profit on Tuesday, boosted by successful portfolio company listings even as a stronger yen dampened foreign currency-denominated gains. Analysts are also looking out for signs of new investment momentum driven by SoftBank’s robust balance sheet and management’s bullish stance on artificial intelligence (AI). The net profit forecast