fix: Send correct message action from ledger offscreen bridge to ledg…

…er bridge (#24622)

## **Description**

Fixes a bug. Personal signatures were broken for ledger on MV3. The
problem was that the offscreen bridge named those message actions
incorrectly. The ledger bridge expects `'ledger-sign-personal-message'`:
https://github.com/MetaMask/eth-ledger-bridge-keyring/blob/gh-pages/ledger-bridge.js#L35-L37

This is consistent with the implementation of `deviceSignMessage` on the
current iframe bridge:
https://github.com/MetaMask/eth-ledger-bridge-keyring/blob/main/src/ledger-iframe-bridge.ts#L219-L226

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## **Related issues**

Fixes: #24588

## **Manual testing steps**

1. Build MV3
2. Import a ledger
3. Go to the test dapp
4. Try a Personal Sign
5. Accept in MM
6. You should see the signature on your ledger and be able to
successfully sign

## **Pre-merge author checklist**

- [ ] I’ve followed [MetaMask Coding
Standards](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/CODING_GUIDELINES.md).
- [ ] I've completed the PR template to the best of my ability
- [ ] I’ve included tests if applicable
- [ ] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [ ] I’ve applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [ ] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.

app/scripts/lib/offscreen-bridge/ledger-offscreen-bridge.ts

@@ -131,7 +131,7 @@ export class LedgerOffscreenBridge implements LedgerBridge {
       chrome.runtime.sendMessage(
         {
           target: OffscreenCommunicationTarget.ledgerOffscreen,
-          action: LedgerAction.signMessage,
+          action: LedgerAction.signPersonalMessage,
           params,
         },
         (response) => {

shared/constants/offscreen-communication.ts

@@ -39,7 +39,7 @@ export enum LedgerAction {
   unlock = 'ledger-unlock',
   getPublicKey = 'ledger-unlock',
   signTransaction = 'ledger-sign-transaction',
-  signMessage = 'ledger-sign-message',
+  signPersonalMessage = 'ledger-sign-personal-message',
   signTypedData = 'ledger-sign-typed-data',
 }