LOS ANGELES—The Lakers’ immediate rematch with Houston was a whole lot tougher than the initial meeting, and it wasn’t decided until Kevin Porter Jr.’s 3-pointer rimmed out right before the buzzer. Los Angeles still kept winning with a huge collective game from its new Big Three. LeBron James scored 14 of his 30 points in the fourth quarter, Russell Westbrook added 27 points and the Lakers swept back-to-back games against the Rockets with a 119-117 victory Tuesday night. Anthony Davis had 27 points, nine rebounds and three blocked shots for the Lakers, who have won three straight and five of six after an 0-2 start to their reboot season. After dominating Sunday’s visit from Houston, Los Angeles struggled through the first half and trailed by 11 in the third quarter of the rematch before they were spurred to the win by Westbrook and James, who put LA ahead to stay …