[Android] Add seek buttons in the notification bar

[Robert Stone]

vlc-android | branch: master | Robert Stone <rhstone at gmail.com> | Sat Jan 15 10:51:30 2022 -0800| [ef6a885c33657e82704d239010ff89d50aabb280] | committer: Nicolas Pomepuy

Add seek buttons in the notification bar

> https://code.videolan.org/videolan/vlc-android/commit/ef6a885c33657e82704d239010ff89d50aabb280
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 .../java/org/videolan/tools/KotlinExtensions.kt    |  1 +
 .../src/org/videolan/vlc/PlaybackService.kt        | 19 +++--
 .../videolan/vlc/gui/helpers/NotificationHelper.kt | 83 ++++++++++++++++------
 3 files changed, 79 insertions(+), 24 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/ef6a885c33657e82704d239010ff89d50aabb280