[Android] Improve fastcroll behavior: smoothness + collapse/expand/FAB behavior.

[Nicolas Pomepuy]

vlc-android | branch: master | Nicolas Pomepuy <nicolas.pomepuy at gmail.com> | Wed Feb 13 08:25:52 2019 +0100| [d8bd7a66e4b13491da6345e24cf5b52f26a9ee16] | committer: Geoffrey Métais

Improve fastcroll behavior: smoothness + collapse/expand/FAB behavior.

> https://code.videolan.org/videolan/vlc-android/commit/d8bd7a66e4b13491da6345e24cf5b52f26a9ee16
---

 vlc-android/res/layout/fastscroller.xml            |  1 +
 .../src/org/videolan/vlc/gui/PlaylistFragment.kt   |  3 +-
 .../vlc/gui/audio/AudioAlbumsSongsFragment.java    |  3 +-
 .../vlc/gui/audio/AudioBrowserFragment.java        |  3 +-
 .../src/org/videolan/vlc/gui/view/FastScroller.kt  | 61 +++++++++++++++++-----
 5 files changed, 56 insertions(+), 15 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/d8bd7a66e4b13491da6345e24cf5b52f26a9ee16