[Android] benchmark: add benchmark activity

[Duncan McNamara]

vlc-android | branch: master | Duncan McNamara <dcn.mcnamara at gmail.com> | Fri Jan  6 16:52:00 2017 +0100| [2de9456ac4e29f8b3a243807aa3f2942e9ba9903] | committer: Geoffrey Métais

benchmark: add benchmark activity

> https://code.videolan.org/videolan/vlc-android/commit/2de9456ac4e29f8b3a243807aa3f2942e9ba9903
---

 vlc-android/AndroidManifest.xml                    |   9 +-
 .../vlc/gui/video/benchmark/BenchActivity.java     | 472 +++++++++++++++++++++
 .../gui/video/benchmark/ShallowVideoPlayer.java    |  72 ++++
 3 files changed, 552 insertions(+), 1 deletion(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/2de9456ac4e29f8b3a243807aa3f2942e9ba9903