[Android] code cleaning to make it more kotlin idiomatic

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Thu May 23 15:35:29 2019 +0200| [4afb7f9d1281b2f651a2c58f887306a76e6d39a1] | committer: Geoffrey Métais

code cleaning to make it more kotlin idiomatic

> https://code.videolan.org/videolan/vlc-android/commit/4afb7f9d1281b2f651a2c58f887306a76e6d39a1
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 .../videolan/vlc/gui/video/VideoPlayerActivity.kt  | 122 ++++----------------
 .../videolan/vlc/gui/video/VideoTouchDelegate.kt   | 123 ++++++++++-----------
 2 files changed, 78 insertions(+), 167 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/4afb7f9d1281b2f651a2c58f887306a76e6d39a1