daemon: Remove org.apertis.Sensors1 well-known D-Bus name

While in principle it’s a good idea to have a non-project-specific
generic well-known name to expose services on, this only makes sense if
the object paths, interface names and other naming are also generic,
which they are not for Rhosydd.

Since Rhosydd is (for the foreseeable future) likely to be the only
sensors and actuators daemon on the system, it’s safe to simply use
org.apertis.Rhosydd1 as //the// well-known name for the SDK sensors API.

As the vehicle manager interface has now been removed, which is what was
exposed to backends, there is also no need to keep two sets of objects
exposed separately by the daemon.

Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Signed-off-by: Philip Withnall <philip.withnall@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D3156