[Android] Refactor Fast Scroller

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Tue Apr 10 14:31:32 2018 +0200| [d3256e1448ee50907e6816873aa64893fcc9a8ff] | committer: Geoffrey Métais

Refactor Fast Scroller

> https://code.videolan.org/videolan/vlc-android/commit/d3256e1448ee50907e6816873aa64893fcc9a8ff
---

 .../vlc/gui/audio/AudioAlbumsSongsFragment.java    |   2 -
 .../vlc/gui/audio/AudioBrowserAdapter.java         | 106 +++------------------
 .../vlc/gui/audio/AudioBrowserFragment.java        |   2 +-
 .../org/videolan/vlc/gui/view/FastScroller.java    |  67 +++++++------
 4 files changed, 51 insertions(+), 126 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/d3256e1448ee50907e6816873aa64893fcc9a8ff