[Android] Convert RecommendationsService to Kotlin

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Wed Jul  4 15:44:34 2018 +0200| [81e18b92473d2a0686a5cb298c25fe63aecb4666] | committer: Geoffrey Métais

Convert RecommendationsService to Kotlin

Convenient for using VLCIO context

> https://code.videolan.org/videolan/vlc-android/commit/81e18b92473d2a0686a5cb298c25fe63aecb4666
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 .../org/videolan/vlc/RecommendationsService.java   | 114 ---------------------
 .../src/org/videolan/vlc/RecommendationsService.kt | 100 ++++++++++++++++++
 2 files changed, 100 insertions(+), 114 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/81e18b92473d2a0686a5cb298c25fe63aecb4666