[Android] Add multiLanguage subtitle download

[Habib Kazemi]

vlc-android | branch: master | Habib Kazemi <kazemihabib1996 at gmail.com> | Sun Oct 21 10:02:59 2018 +0330| [29d7906f6aee3ec14359585aac649fe43a9fe0cc] | committer: Geoffrey Métais

Add multiLanguage subtitle download

Signed-off-by: Geoffrey Métais <geoffrey.metais at gmail.com>

> https://code.videolan.org/videolan/vlc-android/commit/29d7906f6aee3ec14359585aac649fe43a9fe0cc
---

 .../res/layout/subtitle_download_fragment.xml      |   4 +-
 vlc-android/res/values/arrays.xml                  |   2 -
 .../org/videolan/vlc/gui/MultiSelectionSpinner.kt  | 113 +++++++++++++++++++++
 .../vlc/gui/dialogs/SubtitleDownloadFragment.kt    |  18 ++--
 .../vlc/repository/OpenSubtitleRepository.kt       |  12 +--
 .../org/videolan/vlc/viewmodels/SubtitlesModel.kt  |  18 ++--
 6 files changed, 139 insertions(+), 28 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/29d7906f6aee3ec14359585aac649fe43a9fe0cc