Extend robustness of cdda playback

[lazypingu]

This PR tries to address some CDDA playback issues.

Changes:

1. Moved speed adjutment after cdio_cddap_open as done in cd-paranoia (this seems to prevent errors on speed adjustment)
2. Use sector functions from libcdio-paranoia (cdio_cddap_*) to detect sectors (this seems to increase the robustness on special cases like hidden tracks or multisession CDs)
3. Added checks for errors on lsns and non audio tracks

Improvments:

• playback of hidden audio tracks (track 0) if present
• complete playback of last track on cd-extra CDs (multisession CDs)
• skipping of tracks on errors like no hidden track, out of range (> num-tracks) or non audio tracks

[MaxKellermann]

Now there are two more fixup commits for known-bad PR commits.

[lazypingu]

@MaxKellermann Got your point. Thanks! I've tried to rewrite the history with all suggestions.

[MaxKellermann]

I find your commit messages very lacking still.

• "Move cddap_speed_set below cddap_open as cd-paranoia does to avoid errors on setting speed" - what errors are avoided, and why are they avoided if ordered that way?
• "Use sector functions from libcdio-paranoia (cdiocddap*) to detect sectors" - I have NO CLUE what this means and why you propose changing this and what the consequences are.
• "Add checks for errors on lsns and non audio tracks" - what is "errors on lsns"?

[lazypingu]

@MaxKellermann I've tried to specify the commit messages for more clarity.