Univision, in the midst of management turnover, announced higher second-quarter earnings despite a drop in revenue. Net income rose 8% to $114.3 million from $106.1 million a year ago because of lower interest and tax payments. Adjusted operating income fell 7.5% to $304.1 million. In recent months, Univision’s CEO, head of content and chief revenue officer have all left the company as the once dominant Spanish-language media company has been under increased pressure from Comcast’s Telemundo.