[Fix][DVDPlayer] This fixes a regression introduced in 50a1d3c.

If subs got disabled by OpenDefaultStreams they could not be turned on by the osd toggle.
[Fix][OMXPlayer] This fixes a regression introduced in 50a1d3c.

If subs got disabled by OpenDefaultStreams they could not be turned on by the osd toggle.
Merge pull request #3686 from ace20022/fix_subs_auto_regr

[Fix][DVDPlayer] This fixes a regression introduced in 50a1d3c.