Will Tesla, Inc.’s (NASDAQ:TSLA) full self-driving technology pose a risk to the prospects of one of Berkshire Hathaway, Inc.’s (NYSE:BRKA) (NYSE:BRKB) portfolio companies? Billionaire investor Warren Buffett was asked this question at the company’s annual shareholder meeting on Saturday. Tesla A Risk To GEICO? An investor in both Elon Musk‘s Tesla and Berkshire posed a question to Buffett: If Musk succeeds in reducing accidents by 50% compared to human drivers with Full Self-Driving (FSD), wouldn’t auto insurance rates decrease to reflect the reduced underwriting risk? The investor also asked…