[Android] Update Readme

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey at videolan.org> | Fri Mar 27 08:39:42 2020 +0100| [1851752fd07b7a959cdac00bf91143ff6bf929da] | committer: Nicolas Pomepuy

Update Readme

> https://code.videolan.org/videolan/vlc-android/commit/1851752fd07b7a959cdac00bf91143ff6bf929da
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 README.md                | 122 ++++++++++--
 libvlc/COPYING.LIB       | 502 +++++++++++++++++++++++++++++++++++++++++++++++
 medialibrary/COPYING.LIB | 502 +++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 1110 insertions(+), 16 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/1851752fd07b7a959cdac00bf91143ff6bf929da