Elliot Chen 4b44169f05 gstplay: support disabling the selected track at startup
In some cases, need to disable some type tracks at startup before
receiving the stream collection message. And fix printing error log
in this case.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8568>
2025-02-28 18:10:18 +09:00
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