Possible duplicated auto-discovered assets after restoring wallet

[StephenHeaps]

Description:

Requires an account with balance on non-native assets that will be found via asset auto-discovery

Steps to Reproduce

1. Fresh install
2. Setup wallet with assets that get found by asset auto discovery
3. Close wallet
4. Open Settings -> Web3
5. Reset Wallet
6. Open Wallet
7. Restore wallet from step 2

Actual result:

Assets found via auto discovery are duplicated in Portfolio, Edit User Assets, etc.

Expected result:

No duplicated assets

Reproduces how often:

Not sure it occurs every time, but consistent enough to reproduce.

Brave Version:

• Can you reproduce this issue with the most recent build from TestFlight?
• Can you reproduce this issue with the previous version of the current build from TestFlight?
• Can you reproduce this issue with the current build from AppStore?

Device details:

Website problems only:

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

Additional Information

[srirambv]

Verification passed on iPhone 13 with iOS 16.5 running 1.56 (23.7.31.17)

• Verified steps from issue description
• Verified restoring wallet doesn't duplicate tokens