* Remove explicit tracking of elapsed time of previous track.
* Remove function to obtain auto skip flag.
* Most playback events now carry the extra information instead and
pass 'struct track_event *' for data.
* Tweak scrobbler to use PLAYBACK_EVENT_TRACK_FINISH, which makes
it cleaner and removes the struct mp3entry.
Change-Id: I500d2abb4056a32646496efc3617406e36811ec5
Fixing it because correcting the event api prototypes causes many warnings.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23301 a1c6a512-1295-4272-9138-f99709370657