Doubt. Mebbe just a portion of the INTERNATIONAL terminal if any part at all. The airport is shaped like a horseshoe. The International Terminal is at the bottom of the horseshoe. All domestic flights are on either side of the horseshoe. With all of Europe and China currently banned, probably the majority of the International gates are not in use. If we are still accepting SOME foreign flights, then they could just make them use a portion of the terminal(maybe for some decontamination?) or maybe they could do as you say and use the domestic terminals on either side of the horseshoe at LAX. But that might be too much to add to those domestic terminals. Guess we will see.