[Android] Fix some video seek animation issues

[Nicolas Pomepuy]

vlc-android | branch: 3.2.x | Nicolas Pomepuy <nicolas.pomepuy at gmail.com> | Wed Aug 14 09:53:52 2019 +0200| [bcb70403c8f816a986d363821f0e012d82a7326b] | committer: Geoffrey Métais

Fix some video seek animation issues

(cherry picked from commit 4bd3f386ab68b0ebc62e93a02ab784432d4fb46a)

> https://code.videolan.org/videolan/vlc-android/commit/bcb70403c8f816a986d363821f0e012d82a7326b
---

 .../res/drawable/ic_half_seek_forward_tv.xml       |  16 ++
 .../res/drawable/ic_half_seek_rewind_tv.xml        |  16 ++
 vlc-android/res/layout/player_overlay_seek.xml     | 258 +++++++++++----------
 .../videolan/vlc/gui/video/VideoPlayerActivity.kt  |  67 ++++--
 4 files changed, 217 insertions(+), 140 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/bcb70403c8f816a986d363821f0e012d82a7326b