Which is an important point: If the Angels really thought that the batter had been called out, and then was allowed to take first, that would be a misapplication of the rules, and grounds for a protest. The fact that 24 hours later no protest has been filed, suggests that the Angels know they don't have a leg to stand on.
That's an interesting perspective. I hadn't thought about it, but I'm not sure it would stand -- especially when the umpire files his report with the league (which he would be required to do if the game had been played under protest) and says he had no intention to give any indication that the batter was out.