fix: Show composite emojis enlarged, too

[Hocuri]

There are a lot of composite emojis like the flags and the family emojis. Here, the grapheme starts with an emoji, but then come some other characters that modify the first emoji (e.g. all flags start with the flag emoji).

This PR shows those as big, too, by checking whether a grapheme starts with an emoji to determine whether it's an emoji.

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To test the changes in this pull request, install this apk: 📦 app-preview.apk

[github-actions[bot]]

To test the changes in this pull request, install this apk: 📦 app-preview.apk

[github-actions[bot]]

To test the changes in this pull request, install this apk: 📦 app-preview.apk

[github-actions[bot]]

To test the changes in this pull request, install this apk: 📦 app-preview.apk