Since we have no real way to drain stream demux fifo,
we should have a way to reset demuxer before switching to
a new segment.

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

libvlc: expand media player API to retrieve full information about available chapter of a given title

libvlc: expand media player API to retrieve information about all available titles of the currently playing media item