[Android] libvlcjni: remove unused & deprecated functions

[Edward Wang]

On Sun, Jul 28, 2013 at 3:51 AM, Sébastien Toque <git at videolan.org> wrote:
> vlc-ports/android | branch: master | Sébastien Toque <xilasz at gmail.com> | Sun Jul 28 08:10:57 2013 +0200| [a66e94f1c6a2e20bc2daf1f11c6f3039092a2826] | committer: Sébastien Toque
>
> libvlcjni: remove unused & deprecated functions
>

Hello,

I have absolutely no problem with hasMediaPlayer() and
readMediaMeta(), but I think that getLengthFromLocation() can actually
be useful.

On the other hand readMediaMeta is obsoleted by readTracksInfo(), so
it can be removed.

Regards,
    Edward Wang