Only a single QR-code based wallet can be imported in Metamask, not several

### Describe the bug

Hello,

When a QR-code based wallet (e.g. Keystone or Airgap Vault) has already been imported, and trying to import a new QR code based wallet, it is impossible to import a new one. The only possibility is to delete the previous one.

It would be ideal to be able to connect several QR-based hardware devices to MetaMask.

### Steps to reproduce

1. Connect a first QR-code based wallet.
2. Try to connect a second QR-code based wallet.
3. See the message "Looking for your Qr hardware..."
4. The first (1.) wallet public addresses appear, instead of the camera to scan a new QR code.

### Error messages or log output

_No response_

### Version

10.10.2

### Build type

_No response_

### Browser

Firefox

### Operating system

Linux

### Hardware wallet

AirGap Vault

### Additional context

_No response_

Reproduce the issue in Firefox on Linux with an AirGap Vault: import one QR-code wallet, then try to import a second. Trace the QR hardware-wallet import flow from the point where the first wallet's public addresses appear. Done means a second QR code can be scanned and imported without deleting the first wallet.

Written by the indexing model from the issue text.