[Android] Medialibrary: Implement videogroups API

[Geoffrey Métais]

vlc-android | branch: 3.2.x | Geoffrey Métais <geoffrey.metais at gmail.com> | Thu Sep 19 18:38:54 2019 +0200| [0e4acdf728c04baf77c12ed17de9a58db9b8b344] | committer: Geoffrey Métais

Medialibrary: Implement videogroups API

(cherry picked from commit ceebb04d43e582d90933283596549a1e6180213f)

> https://code.videolan.org/videolan/vlc-android/commit/0e4acdf728c04baf77c12ed17de9a58db9b8b344
---

 medialibrary/jni/AndroidMediaLibrary.cpp           |  26 ++++
 medialibrary/jni/AndroidMediaLibrary.h             |   7 +-
 medialibrary/jni/medialibrary.cpp                  | 135 ++++++++++++++++++++-
 medialibrary/jni/utils.cpp                         |  22 ++--
 medialibrary/jni/utils.h                           |  18 +++
 .../videolan/medialibrary/MLServiceLocator.java    |  11 ++
 .../org/videolan/medialibrary/Medialibrary.java    |  24 ++++
 .../interfaces/AbstractMedialibrary.java           |   4 +
 .../interfaces/media/AbstractVideoGroup.java       |  64 ++++++++++
 .../medialibrary/media/MediaLibraryItem.java       |  19 +--
 .../videolan/medialibrary/media/VideoGroup.java    |  46 +++++++
 .../medialibrary/stubs/StubMedialibrary.java       |  14 +++
 .../medialibrary/stubs/StubVideoGroup.java         |  31 +++++
 13 files changed, 398 insertions(+), 23 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/0e4acdf728c04baf77c12ed17de9a58db9b8b344