drm/amd/display: Add audio/video ContainerId implementation

Leave hardcoded if no ContainerId provided by DM.

Signed-off-by: Duke Du <Duke.Du@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>