Enable launching Chrome in incognito
Enable launching Chrome in incognito

Since VSI E2E tests are moving to new infrastructure, an option to
launch chrome in incognito is being added.

GitOrigin-RevId: 55afb8720a31ca29f9bd53f5dce93380dc701eff

googlestadia/vsi-lldb,googlestadia/vsi-lldb,googlestadia/vsi-lldb