[Android] JNI: add wrapper to NewStringUTF for UTF safety

[Duncan McNamara]

vlc-android | branch: master | Duncan McNamara <dcn.mcnamara at gmail.com> | Fri Jul 23 11:07:37 2021 +0200| [9ad8b175e3053f5ea7b49db977fe2cba7435a115] | committer: Duncan McNamara

JNI: add wrapper to NewStringUTF for UTF safety

When calling NewStringUTF with an invalid UTF string it will abort
instead of returning NULL. This wrapper checks the validity of the UTF
string before calling NewStringUTF.

> https://code.videolan.org/videolan/vlc-android/commit/9ad8b175e3053f5ea7b49db977fe2cba7435a115
---

 libvlc/jni/libvlcjni-dialog.c             | 28 ++++++------
 libvlc/jni/libvlcjni-media.c              | 17 +++----
 libvlc/jni/libvlcjni-mediadiscoverer.c    |  4 +-
 libvlc/jni/libvlcjni-mediaplayer.c        | 10 ++---
 libvlc/jni/libvlcjni-rendererdiscoverer.c | 10 ++---
 libvlc/jni/libvlcjni-vlcobject.c          |  2 +-
 libvlc/jni/libvlcjni.c                    |  6 +--
 libvlc/jni/utils.h                        | 31 +++++++++++++
 medialibrary/jni/AndroidMediaLibrary.cpp  | 20 ++++-----
 medialibrary/jni/medialibrary.cpp         |  8 ++--
 medialibrary/jni/utils.cpp                | 74 ++++++++++++++++++++++---------
 medialibrary/jni/utils.h                  |  1 +
 12 files changed, 137 insertions(+), 74 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/9ad8b175e3053f5ea7b49db977fe2cba7435a115