feat: support keystone usb keyring

[Qkin-Keystone]

Explanation

Adds Keystone hardware keyring type and integrates display names across account tree and accounts controllers. This new keyring will be able to handle USB as a transport layer for the keystone hardware wallet.

References

MetaMask/metamask-extension#33980

Changelog

Add keystone usb keyring

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

---

Note

Adds Keystone hardware keyring support and wires up naming across packages.

• Introduces KeyringTypes.keystone in KeyringController
• Adds display names for Keystone wallet and Keystone Account in account tree rules/keyring.ts
• Updates accounts-controller keyringTypeToName to return Keystone
• Updates account-tree-controller CHANGELOG.md to note Keystone USB Keyring support

^{Written by Cursor Bugbot for commit d019c4b. This will update automatically on new commits. Configure here.}

[gantunesr]

nit

Suggested change

	- Add support for Keystone USB Keyring([#7440](https://github.com/MetaMask/core/pull/7440))
	- Add support for Keystone USB Keyring ([#7440](https://github.com/MetaMask/core/pull/7440))

[Qkin-Keystone]

Done, thanks for the nit!