Wallet pending transactions not refreshed on network change

[StephenHeaps]

Description:

Pending transactions are not refreshed when switching networks, so pending transactions for the old network may be shown with incorrect / unavailable transaction details shown in UI.

Steps to Reproduce

Don't close the wallet modal during this flow:

1. Switch to Solana Devnet
2. Create a transaction on Solana Devnet
3. Don't approve/reject the transaction, dismiss the modal
4. Switch to Solana Testnet
5. Tap pending transactions button
6. Observe incorrect transaction details shown

Actual result:

pending.transactions.bug.mov

Expected result:

Transaction is not shown as a pending transaction because it belongs to a different network for the same coin type.

Reproduces how often:

Easily reproduced

Brave Version:

Device details:

Website problems only:

• did you check with Brave Shields down?
• did you check in Safari/Firefox (WkWebView-based browsers)?

Additional Information

Showing pending transactions for all networks on all supported coin types is not yet supported, see brave/brave-browser#24382