dpp-json: First pass at MRS3 status.

Note this is a bit fiddly and may require manually poking at the control
unit to get it to wake up and respond to the request properly.
Manager: Slow down when communicating with the airbag CU.
Manager: Make the android specific bits conditional.
dpp-json: Add MS42.0 VANOS status.
dpp-json: Add MS42 variant and VANOS temp mode blobs.  Rename.
ControlUnit: Add support for signed byte-sized types.
ControlUnit: Throw an exception on an invalid operation name.