agl-demo: add 4A as a dependency and a separate agl-demo-soundmanager
When running aglsetup with feature 'agl-demo', 4A is now enabled.
The feature 'agl-audio-4a-framework' is added to the feature deps.
For the agl-audio-soundmanager framework use agl-demo-soundmanager.
Discussed in SAT meeting on
20180719.
Bug-AGL: SPEC-1234
Bug-AGL: SPEC-1598
Change-Id: Ief75404c6ab818e58394b3ab55f221f823363362
Signed-off-by: Stephane Desneux <stephane.desneux@iot.bzh>
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>