[Bug]: Hardware wallets: Two toast messages for Transaction submitted when sending using hardware wallet

### Describe the bug

When sending a transaction using Ledger or Keystone, there are two teas messages with Transaction submitted stacked on top of each other

### Expected behavior

Only one toast with Transaction submitted

### Screenshots/Recordings

https://github.com/user-attachments/assets/e56ecc06-397f-4769-a8aa-08c07a7c4cc2

https://github.com/user-attachments/assets/19ecb7f1-fb0d-473c-8ef5-b5c8363c8ec0

### Steps to reproduce

1. Send Transaction using Ledger or Keystone
2. Notice two toast messages Transaction submitted

### Error messages or log output

```shell

```

### Where was this bug found?

Internal release testing

### Version

8.7.0

### Build number

6409

### Build type

None

### Device

iPhone 15

### Operating system

iOS

### Additional context

_No response_

### Severity

_No response_

Start by reproducing the send flow on iPhone with Ledger and Keystone, using the issue's steps, then trace where the “Transaction submitted” toast is triggered. Verify the fix by confirming that each hardware-wallet transaction shows only one toast on iOS.

Written by the indexing model from the issue text.