[Android] Refactor headless fragments calls

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Thu Jan 17 10:28:55 2019 +0100| [c5e14606cb4be0f969d19ee38a24ea70f96d7039] | committer: Geoffrey Métais

Refactor headless fragments calls

> https://code.videolan.org/videolan/vlc-android/commit/c5e14606cb4be0f969d19ee38a24ea70f96d7039
---

 .../vlc/gui/helpers/hf/BaseHeadlessFragment.kt     | 38 ++------------------
 .../gui/helpers/hf/StoragePermissionsDelegate.kt   | 40 +++++++++++++++-------
 .../vlc/gui/helpers/hf/WriteExternalDelegate.kt    | 31 +++++++++--------
 3 files changed, 48 insertions(+), 61 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/c5e14606cb4be0f969d19ee38a24ea70f96d7039