Add missing icons for Element X.

# Context

Element X Android still relies on a few icons provided by the Material library. I want to remove this dependency and rely only on icons from the Compound library.

Here is the list of Icons used on Element X Android which do not exist on Compound, with a preview on how they render currently:

- [ ] Fingerprint

- [ ] Backspace (for the pin composer)

- [ ] Stop button. We already have play and pause, we need stop for the voice message.
- [ ] Winner icon. For the winner answer of a poll.

- [ ] Folder
- [ ] SubdirectoryArrowLeft

- [ ] Icons as header for the emoji picker:
- [ ] EmojiEvents
- [ ] EmojiFlags
- [ ] EmojiFoodBeverage
- [ ] EmojiNature
- [ ] EmojiObjects
- [ ] EmojiPeople
- [ ] EmojiSymbols
- [ ] EmojiTransportation

There are used in the header here:

We could also decide to use Emoji for this header. Also note that this screen on iOS does not render exactly the same. Please let me know your decision.

- [ ] Also, please confirm that this icon replacement is OK, else please also provide an new icon (Google: AddAPhoto, Compound: TakePhoto):

# Figma document

# Screenshot