Enable Privacy mode for this VPA.
When enabled, the user cannot invoke this VPA and the VPA will not proactively start a conversation or send any notifications to the user. The frontend should accompany this by disabling all VPA-related screens (such as Settings) and UI controls (such as 'push-to-talk' if present). This can be used in restricted modes such as valet or for guest drivers.
true if Privacy mode should be enabled,