[Android] Allow adding multiple videos to a new group

[Nicolas Pomepuy]

vlc-android | branch: 3.3.x | Nicolas Pomepuy <nicolas at videolabs.io> | Fri Oct  9 11:55:30 2020 +0200| [527b2bb1292d3aba7822d60888191104c0c8edd0] | committer: Nicolas Pomepuy

Allow adding multiple videos to a new group

Fixes #1472

(cherry picked from commit 0b368a9a9bfd6c2ab7d712da53a086dfd5ffd4db)

> https://code.videolan.org/videolan/vlc-android/commit/527b2bb1292d3aba7822d60888191104c0c8edd0
---

 .../main/java/org/videolan/resources/Constants.kt  |  3 +++
 .../resources/src/main/res/values/strings.xml      |  2 ++
 .../vlc-android/res/layout/dialog_add_to_group.xml |  7 +++----
 .../src/org/videolan/vlc/gui/SimpleAdapter.kt      | 11 +++++++++++
 .../videolan/vlc/gui/dialogs/AddToGroupDialog.kt   | 23 +++++++++++++++++++---
 .../org/videolan/vlc/gui/helpers/ImageLoader.kt    |  7 +++++++
 .../src/org/videolan/vlc/gui/helpers/UiTools.kt    |  3 ++-
 .../videolan/vlc/gui/video/VideoGridFragment.kt    | 14 ++++++-------
 8 files changed, 55 insertions(+), 15 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/527b2bb1292d3aba7822d60888191104c0c8edd0