Feature Description: Add ChangeSkin support for player faces.

Additional context: ChangeSkin is a lightweight alternative for SkinsRestorer (which is considered by some users as a bloatware) with a really straightforward functionality.

Thank you for your feature request. Due to the volume of feature requests we receive we have relocated all of our features requests to a single issue #3461.

For some future reference

https://github.com/games647/ChangeSkin/blob/570b321fbcbedda96ce1ef608d718e187bb9e709/bukkit/src/main/java/com/github/games647/changeskin/bukkit/ChangeSkinBukkit.java#L102

https://github.com/games647/ChangeSkin/blob/570b321fbcbedda96ce1ef608d718e187bb9e709/core/src/main/java/com/github/games647/changeskin/core/model/UserPreference.java#L84

https://github.com/games647/ChangeSkin/blob/570b321fbcbedda96ce1ef608d718e187bb9e709/core/src/main/java/com/github/games647/changeskin/core/model/skin/SkinModel.java#L151

https://github.com/games647/ChangeSkin/blob/570b321fbcbedda96ce1ef608d718e187bb9e709/core/src/main/java/com/github/games647/changeskin/core/model/skin/TextureModel.java#L29