Merge "Demote UnicodeInCode error to warning" am: 04aba7cd55 am: bd5499f46c am: e205982ecd

Original change: https://android-review.googlesource.com/c/platform/external/tagsoup/+/1971286

Change-Id: Ib17d93772e5d40c5566cd72aa454b34185028c9b