No, the projection assumes no measures at all are taken - not even the ones that already have been.

"Newsom’s request said 56 percent of California’s population, a whopping 25.5 million people, would be infected over an eight-week period. A governor spokesperson later clarified the projection included zero mitigation efforts such as the Bay Area’s shutdown of non-essential businesses to decrease contact between residents."

https://www.ocregister.com/2020/03/19/gov-newsom-56-percent-...

I think this is "business as usual" (which includes the bay area shelter-in-pace) and doesn't account for the shelter-in-place order from this afternoon.