Defines two separate product FCMs for redfin VF: R vendor and S vendor.

Both are device manifest level=5, but the R vendor and S vendor provide
a slightly different set of HALs.

Bug: 184545288
Test: Include the R FCM on a system-only build merged with an R-based
      vendor, merge & boot
Test: Likewise, for S FCM and S-based vendor.
Change-Id: I5658dc4a9d989e38c7fa05337c37457598368aa2