meta-tizen: audio-session-manager: remove vconftool command

meta-tizen: audio-session-manager: remove vconftool command

In the postinst script, one of the vconftool command fails to execute
which prevents the image to be built. As a TEMPORARY WORKAROUND the
failing command is removed. This patch will need to be reverted as soon
as this issue has been properly corrected.

Bug-Tizen: BTY-27
Change-Id: If11f9a5cdb527b048ebeebbc34b275f611c2b068
(From meta-tizen rev: 61b83f720df57e434491ba9a401d723af643a04f)

Signed-off-by: Kévin THIERRY <kevin.thierry@open.eurogiciel.org>
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>