[Android] MainActivity: Navigator helper class

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Fri Mar 16 17:34:54 2018 +0100| [d3125c231511bf54ce4d35617122d0037985fb51] | committer: Geoffrey Métais

MainActivity: Navigator helper class

Removes a lot of boilerplate

> https://code.videolan.org/videolan/vlc-android/commit/d3125c231511bf54ce4d35617122d0037985fb51
---

 .../videolan/vlc/extensions/ExtensionsManager.java |   6 +-
 .../vlc/gui/AudioPlayerContainerActivity.java      |  10 +-
 .../src/org/videolan/vlc/gui/MainActivity.java     | 308 +++------------------
 .../vlc/gui/browser/BaseBrowserFragment.java       |   2 +-
 .../src/org/videolan/vlc/gui/helpers/Navigator.kt  | 219 +++++++++++++++
 .../videolan/vlc/gui/video/VideoGridFragment.java  |   2 +-
 .../src/org/videolan/vlc/util/Constants.java       |  22 +-
 7 files changed, 284 insertions(+), 285 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/d3125c231511bf54ce4d35617122d0037985fb51