VideoPlayerActivity: add external position API
VideoPlayerActivity: function cosmetics
CommonDialogs: segregate audio and video menus
jni: add addSubtitleTrack()
VideoPlayerActivity: allow opening a specific subtitle file

Close #7585
PreferencesActivity: add VIDEO_SUBTITLE_FILES
VideoPlayerActivity: persist subs across pause/resume
VideoPlayerActivity: show sub icon after selection of subtitle
VideoPlayerActivity: workaround lack of subtitle events to update icon
VideoPlayerActivity: remove binary extraneous debug

Spewing binary onto the logcat is not a nice thing to do :)
NEWS about subtitle selection (#7585)
l10n: Hebrew update

Signed-off-by: Edward Wang <edward.c.wang@compdigitec.com>
l10n: Bosnian update

Signed-off-by: Edward Wang <edward.c.wang@compdigitec.com>
l10n: Catalan update

Signed-off-by: Edward Wang <edward.c.wang@compdigitec.com>
l10n: Welsh update

Signed-off-by: Edward Wang <edward.c.wang@compdigitec.com>
l10n: Danish update

Signed-off-by: Edward Wang <edward.c.wang@compdigitec.com>
l10n: Spanish update

Signed-off-by: Edward Wang <edward.c.wang@compdigitec.com>
l10n: Gaelic Scottish update

Signed-off-by: Edward Wang <edward.c.wang@compdigitec.com>
l10n: Galician update

Signed-off-by: Edward Wang <edward.c.wang@compdigitec.com>
l10n: Hindi update

Signed-off-by: Edward Wang <edward.c.wang@compdigitec.com>