Log Message:
libheif: Update to 1.9.1

Changelog:
1.9.1
    fixed missing inline definition in C++ wrapper

1.9.0
    add dav1d decoder plugin for faster decoding of AVIF images
    support for images having both ICC and NCLX profiles
    save NCLX profiles to AV1/HEVC bitstreams and also read them from the bitstream
    add color profile API to C++ wrapper
    improve rounding in color conversions
    conformant encoding of AVIF images <16 pixels
    many fixes and small improvements