RootCanal: Add configuration placeholder for toggling support for vendor commands

In the rootcanal configuration, a new field is added for vendor features
which defines flags for the csr command.

In the rootcanal controller properties, add flag vendor_csr
matching the configuration flag.

Bug: 296143555
Test: m root-canal
Change-Id: Ifeeaaea56f19784de7cc1cc28d0f5623d8524af4