[Android] Add a reason for the pin code activity

[Nicolas Pomepuy]

vlc-android | branch: master | Nicolas Pomepuy <nicolas at videolabs.io> | Mon Jun 26 11:43:19 2023 +0200| [c0e3815b8b4471d3afa19736958b9cc6009e3327] | committer: Duncan McNamara

Add a reason for the pin code activity

> https://code.videolan.org/videolan/vlc-android/commit/c0e3815b8b4471d3afa19736958b9cc6009e3327
---

 .../resources/src/main/res/values/strings.xml      |  4 +++
 .../vlc-android/res/layout/pin_code_activity.xml   | 28 ++++++++++++++-----
 .../res/xml/preferences_parental_control.xml       |  5 ++++
 .../src/org/videolan/vlc/gui/PinCodeActivity.kt    | 21 ++++++++++++++
 .../gui/preferences/PreferencesParentalControl.kt  | 32 +++++++++++++++-------
 .../videolan/vlc/gui/preferences/PreferencesUi.kt  |  6 ++--
 6 files changed, 76 insertions(+), 20 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/c0e3815b8b4471d3afa19736958b9cc6009e3327