Add missing icons for Element X.

[bmarty]

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)

• 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

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