Fix gaps in gainmap support in TransformationUtils

[falhassen]

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We need to update the remainder of TransformationUtils (i.e., not rotateImageExif which was handled in https://github.com/bumptech/glide/issues/5333) to remove usage of BitmapPool and use Bitmap.create to create Bitmaps. See https://github.com/bumptech/glide/pull/5334/ for an example of how to do it.