Starbucks outlined its five-year growth plans to investors on Wednesday, about a week after it announced that Howard Schultz, who has built Starbucks into a global brand with 25,000 locations since first joining the company more than 30 years ago, would step down as CEO in April. In China, the company said it is teaming up with popular messaging app WeChat to let users buy digital Starbucks gift cards for their friends.