Heat oil in an electric pressure cooker set to Sauté mode. Add onion and cook until beginning to soften, about 3 minutes. Add garlic, cumin, chile powder and salt and cook until fragrant, about 1 minute. Stir in broth, chicken and beans. Use a wooden spoon to press all the ingredients down into the broth. Close and lock the lid. Cook at high pressure for 8 minutes.