There is a bug in AStreamSeekStream that is causing all input modules
that support CAN_SEEK to be treated as CAN_FASTSEEK.  This in turn
causes far too many seeks in slower seeking sources which results in
performance problems when playing video.  The fix is a simple change of
CAN_SEEK to CAN_FASTSEEK.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
(cherry picked from commit ce127fd5)