[Android] Browser: add batch delete in action mode

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Fri Jun  7 14:49:58 2019 +0200| [91b4d28d5c2a8705821ddae5df838735f60e1bba] | committer: Geoffrey Métais

Browser: add batch delete in action mode

> https://code.videolan.org/videolan/vlc-android/commit/91b4d28d5c2a8705821ddae5df838735f60e1bba
---

 vlc-android/res/values/strings.xml                 |  1 +
 .../vlc/gui/browser/BaseBrowserFragment.kt         |  7 ++--
 .../vlc/gui/browser/MediaBrowserFragment.kt        | 37 +++++++++++-----------
 .../src/org/videolan/vlc/gui/helpers/UiTools.kt    |  2 +-
 .../gui/helpers/hf/StoragePermissionsDelegate.kt   | 16 +++++++---
 .../vlc/gui/helpers/hf/WriteExternalDelegate.kt    |  4 +--
 vlc-android/src/org/videolan/vlc/util/FileUtils.kt |  9 +++---
 7 files changed, 44 insertions(+), 32 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/91b4d28d5c2a8705821ddae5df838735f60e1bba