[Android] Use channels to wrap mediabrowser callbacks

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Wed May 30 18:13:09 2018 +0200| [01b3777c8896d60b2f92777f6e1abf6d33e14591] | committer: Geoffrey Métais

Use channels to wrap mediabrowser callbacks

> https://code.videolan.org/videolan/vlc-android/commit/01b3777c8896d60b2f92777f6e1abf6d33e14591
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 .../vlc/viewmodels/browser/BrowserProvider.kt      | 129 +++++++++++----------
 .../vlc/viewmodels/browser/FileBrowserProvider.kt  |   4 +-
 .../vlc/viewmodels/browser/NetworkProvider.kt      |   5 +-
 3 files changed, 74 insertions(+), 64 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/01b3777c8896d60b2f92777f6e1abf6d33e14591