Copied the code in `EmojiAvatarCreation` and pasted it into both `EmojiUserAvatarCreation` and `EmojiThreadAvatarCreation`. Also updated the navigators and imports to use these two new components.
There is a bunch of shared code in `EmojiUserAvatarCreation` and `EmojiThreadAvatarCreation`, but the next diff will handle factoring out all the shared code back into `EmojiAvatarCreation`