Add Account not prompted if account exists for same coin type on other keyring

[StephenHeaps]

Description:

Network picker does not prompt to create an account for Filecoin testnet/mainnet if an account is created for the opposite network. Ex Filecoin Mainnet account exists, then Filecoin Testnet is selected in network picker (or vice-versa).

Steps to Reproduce

1. Create a fresh wallet
2. Enable Show Test Networks in Web3 Settings -> Networks
3. Add Filecoin Mainnet account
   • Can occur vice-versa too, creating Filecoin Testnet account here then selecting Mainnet in step 5
4. Open Buy or Swap
5. Select Filecoin Testnet in network picker
   • If Filecoin Testnet account created, select Filecoin Mainnet in network picker
6. Observe Filecoin Testnet selected but Filecoin Mainnet

Actual result:

Filecoin Mainnet account selected / Filecoin Testnet network selected

Account.Network.Mismatch.mp4

Expected result:

Prompt to create an account if one does not exist for the network being selected

Reproduces how often:

Easily reproduced

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:

• Does the issue resolve itself when disabling Brave Shields?
• Is the issue reproducible on the latest version of Mobile Safari?

Additional Information

Hit testing Bitcoin add account, but same bug exists for Filecoin.

cc @srirambv @nuo-xu

[kjozwiak]

The above requires 1.64.115 or higher for 1.64.x verification 👍

[srirambv]

Verification passed on iPhone 13 with iOS 17.4.1 running 1.66 (41) Nightly build

• Verified steps from brave/brave-core#22799
• Verified when no FIL account created, selecting Buy/Deposit on FIL token details screen both shows account creation message
• Verified selecting FIL in accounts tab and clicking on Buy/Deposit and selecting FIL Testnet prompts to create an account

Account Screen	Asset Screen
37114-Account.Screen.MP4	37114-Asset.Screen.MP4