Does Google's Duplex violate two-party consent laws?

Google's Duplex, which calls businesses on your behalf and imitates a real human, ums and ahs included, has sparked a bit of controversy among privacy advocates. Doesn't Google recording a person's voice and sending it to a datacenter for analysis violate two-party consent law, which requires everyone in a conversation to agree to being recorded? Let's take California's law as the example, since that's the state where Google is based and where it used the system. Penal Code section 632 forbids recording any "confidential communication" (defined more or less as any non-public conversation) without the consent of all parties. Google has provided very little in the way of details about how Duplex actually works, so attempting to answer this question involves a certain amount of informed speculation.