Changes:
- Switch agl-cluster-demo-support from using IMAGE_FEATURES to
AGL_FEATURES to work better with building the different demo
images.
- Add a connman bbappend to move the agl-cluster-demo-support
specific logic out of meta-agl-core.
Bug-AGL: SPEC-3749
Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Iad42662db903b7403ec7985c315793fdcd6fc9a7