Playbin3 pipeline is pending during prerolling

Submitted by HoonHee Lee

Dear All

Playbin3 pipeline is pending during trick play (flush seeking) with -2x.

All buffers come to decoder but, it is not pushed out to downstream even if EOS comes. And pipeline does not complete preroll state (seek-done).

I think below commit affects this symptom.
==> ce65017d decodebin3/urisourcebin: Switch to actual EOS events internally

Version: 1.14.0