agl-service-voice-high-capabilities: remove submodule usage

agl-service-voice-high-capabilities: remove submodule usage

Update agl-service-voice-high-capabilities recipe to replace git
submodule usage with DEPENDS on libafb-helpers and libappcontroller.
nlohmann-json has been added also been added as a dependency since
the json.hpp it provides is no longer available from libafb-helpers
as it previously was from the submodule.  Finally, the lua
dependencies have been removed since nothing in the binding's
controller usage requires them.

Bug-AGL: SPEC-2855, SPEC-2857

Change-Id: I8e6eaa88c294b1c8d97c5eefab912e87aebd8e80
Signed-off-by: Scott Murray <scott.murray@konsulko.com>