DashPlayer: Don't queue EOS in flushing state on error from codec

Don't queue EOS to renderer in flushing/flushed state on error from
codec

Change-Id: If1abb471c4209d3fc12cb752bdbe0cc27717a7c2
CRs-Fixed: 515232
Signed-off-by: Hieu Phan <aznrice2k4@gmail.com>