The centerpiece of the proposed 2024 Olympic Games in Los Angeles would be a $1 billion village where athletes would eat and sleep. But with a deadline 18 days away for the submission of a candidate from the United States to host the 2024 Games, the plan remains a mystery in many ways. Analysts have warned that costs for the Olympic Village might significantly exceed projections. On Friday, a City Council committee advanced a proposal to let Mayor Eric Garcetti execute agreements related to the bid, a move that a city lawyer said would prevent unchecked spending.