[Android] Implement audio boost

[David Papazian]

vlc-android | branch: master | David Papazian <david.papazian at metz.supelec.fr> | Wed Aug 23 10:30:42 2017 +0200| [7a07dc91dd28812ebb5e076181b3f7ecb31083d7] | committer: Geoffrey Métais

Implement audio boost

Signed-off-by: Geoffrey Métais <geoffrey.metais at gmail.com>

> https://code.videolan.org/videolan/vlc-android/commit/7a07dc91dd28812ebb5e076181b3f7ecb31083d7
---

 vlc-android/res/layout/player_overlay_info.xml     |   6 ++
 vlc-android/res/values/colors.xml                  |   1 +
 vlc-android/res/values/strings.xml                 |   3 +
 vlc-android/res/xml/preferences_video.xml          |   5 +
 .../vlc/gui/video/VideoPlayerActivity.java         | 107 +++++++++++++++++----
 5 files changed, 105 insertions(+), 17 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/7a07dc91dd28812ebb5e076181b3f7ecb31083d7