Android cpp dependency

As explained in the Official Android C++ Library Support Guide, libc++ is not a system library and must be included in your apk if you use it.

FFmpegKit supports eight external libraries which depend on libc++. These libraries are chromaprint, openh264, rubberband, snappy, srt, tesseract, x265 and zimg. If at least one of these five libraries is enabled while building FFmpegKit, then libc++_shared.so library is added into the ffmpeg-kit.aar archive created.

Additionally, published FFmpegKit packages that include these libraries (video, full and all gpl licensed packages) contain libc++_shared.so library as well.