Bitmap hasAlpha() Always Returns True After AVIF Decoding

[kafchino]

The bitmap decoded by the AvifDecoder.decode(sourceCopy, sourceCopy.remaining(), bitmap) method always has its hasAlpha() property set to true. To resolve this issue, you need to manually set bitmap.setHasAlpha(info.alphaPresent).

testUrl ： https://jakearchibald.com/c/f1-good-BmiDwNjp.avif