[Android] Migrate iab utils to kotlin

[Nicolas Pomepuy]

vlc-android | branch: master | Nicolas Pomepuy <nicolas at videolabs.io> | Wed Aug  5 14:18:19 2020 +0200| [12bb7cbde12a5c14efd176e6051b3d719d2a7485] | committer: Nicolas Pomepuy

Migrate iab utils to kotlin

> https://code.videolan.org/videolan/vlc-android/commit/12bb7cbde12a5c14efd176e6051b3d719d2a7485
---

 .../java/org/videolan/vlc/donations/VLCBilling.kt  |    4 +-
 ...adcastReceiver.java => IabBroadcastReceiver.kt} |   43 +-
 .../util/{IabException.java => IabException.kt}    |   27 +-
 .../org/videolan/vlc/donations/util/IabHelper.java | 1050 --------------------
 .../org/videolan/vlc/donations/util/IabHelper.kt   |  941 ++++++++++++++++++
 .../org/videolan/vlc/donations/util/IabResult.java |   45 -
 .../org/videolan/vlc/donations/util/IabResult.kt   |   45 +
 .../org/videolan/vlc/donations/util/Inventory.java |   91 --
 .../org/videolan/vlc/donations/util/Inventory.kt   |   83 ++
 .../org/videolan/vlc/donations/util/Purchase.java  |   66 --
 .../org/videolan/vlc/donations/util/Purchase.kt    |   49 +
 .../org/videolan/vlc/donations/util/Security.java  |  121 ---
 .../org/videolan/vlc/donations/util/Security.kt    |  112 +++
 .../videolan/vlc/donations/util/SkuDetails.java    |   64 --
 .../org/videolan/vlc/donations/util/SkuDetails.kt  |   47 +
 .../videolan/vlc/gui/dialogs/VLCBillingDialog.kt   |    8 +-
 16 files changed, 1306 insertions(+), 1490 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/12bb7cbde12a5c14efd176e6051b3d719d2a7485