[Android] Add empty views to Folders and Video groups

[Nicolas Pomepuy]

vlc-android | branch: 3.2.x | Nicolas Pomepuy <nicolas.pomepuy at gmail.com> | Wed Sep 25 10:04:19 2019 +0200| [100a3b55ec7046d4f6d9cac6787a5ec472f74a3b] | committer: Geoffrey Métais

Add empty views to Folders and Video groups

(cherry picked from commit dc32f80d709b76057a00bb19477e57ae622f4cfd)

> https://code.videolan.org/videolan/vlc-android/commit/100a3b55ec7046d4f6d9cac6787a5ec472f74a3b
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 vlc-android/res/layout/folders_fragment.xml        | 187 +++++++++++++++------
 vlc-android/res/layout/videogroups_fragment.xml    | 187 +++++++++++++++------
 .../videolan/vlc/gui/folders/FoldersFragment.kt    |  26 ++-
 .../vlc/gui/videogroups/VideoGroupsFragment.kt     |  25 ++-
 4 files changed, 313 insertions(+), 112 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/100a3b55ec7046d4f6d9cac6787a5ec472f74a3b