pulseaudio should be optional in AGL:

 - 4A should be pulseaudio free if wanted.

 -  If a AGL feature need or want pulseaudio, it should use:

DISTRO_FEATURES_append = "  pulseaudio"

• AGL should remove pulseaudio from yocto DISTRO_FEATURES_BACKFILL

DISTRO_FEATURES_BACKFILL_CONSIDERED = "sysvinit pulseaudio"