Place pork in a 6-qt. electric pressure cooker. Top with mushrooms, onion and red pepper. Whisk together hoisin sauce, chili sauce, soy sauce, lime juice, garlic, ginger and rice vinegar; pour over vegetables. Lock lid; close pressure-release valve. Adjust to pressure-cook on high for 20 minutes. Allow pressure to release naturally., Remove pork; shred with 2 forks. Return pork to pressure cooker; heat through. Sprinkle with cilantro and green onions; serve with rice, lime wedges and Sriracha.