Restore cluster and telematics demo images

Changes:
- Restore the image recipes for the agl-cluster-demo-platform and
  agl-telematics-demo-platform images, with updates to them and
  their associated packagegroups for the app framework removal.
- Restore updated recipes required for the above, including:
  * cluster-dashboard
  * cluster-receiver
  * qt-cluster-receiver
  * tbtnavi
- Simple systemd unit files have been added for the cluster
  applications and are installed as user session units.  Starting
  of cluster-dashboard (the XDG version) and cluster-receiver in
  the AGL user session is enabled by default.
- The recipes to install the dedicated network configuration for
  the cluster demo have been restored so that the
  agl-cluster-demo-support and agl-demo-preload features will do
  what is expected again.

Known outstanding issues:
- The previous signal-composer binding support has been removed
  from cluster-dashboard, so related functionality (i.e. driving
  it from CAN) is disabled until replacement is worked out.
- While tbtnavi builds, the previous use of the navigation binding
  is stubbed out in libqtappfw, so it will not receive location
  and route information from ondemandnavi.
- Nothing has been added yet to start tbtnavi in the AGL user
  session, the plan is to do so with a systemd user unit once a
  new mechanism for controlling it from ondemandnavi has been
  implemented.
- The telematics-recorder application has not yet been updated
  to replace its signal-composer, gps, and network binding use.

The intent is to address these issues in the 13.0.x point releases.

Bug-AGL: SPEC-4283

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: I520c23775b21504cb7dd92538319cc5bf826ff64