Implement AssetSelector component

[FrederikBolding]

We should implement a way to let the Snap select from the assets in MetaMask without exposing all of the token details to the Snap.

State
The selected asset should be reflected in state with an object containing:

• asset: CAIP19Identifier
• name: string
• ticker: string

Props

• addresses?: CAIP10Address[] (If passed, should filter to only show tokens owned by these addresses)
• chainIds?: CAIP2ChainId[] (Alternative filtering option to passing addresses)
• selectedAsset?: CAIP19Address

Figma link: TBD

[danroc]

Maybe it should be assetType for consistency with the naming used in CAIP-19 for tokens.

[eriknson]

LoFi spec: https://www.figma.com/board/1M8AhtE2DHMnahTugMBqie/Core-Accounts-Components?node-id=2-211&t=OkCit1tDxKvbO0QD-1