Adding NFT contract address doesn't auto-populate the details the first time

[srirambv]

Description

Adding NFT contract address doesn't auto-populate the details the first time

Steps to Reproduce

1. Clean profile
2. Try adding an NFT via add custom asset
3. Paste in the contract address, none of the other details auto-populate
4. Manually add details and add the NFT to view
5. Try adding the same contract address a second time, all data auto-populates except network

Actual result:

Adding NFT contract address doesn't auto-populate the details the first time

Expected result:

Auto-populate details when NFT contract address is pasted including the network

Reproduces how often:

Easy

Brave version (brave://version info)

All

Version/Channel Information:

• Can you reproduce this issue with the current release? NA
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? NA
• Does the issue resolve itself when disabling Brave Rewards? NA
• Is the issue reproducible on the latest version of Chrome? NA

Miscellaneous Information:

cc: @muliswilliam @nvonpentz @yrliou @jamesmudgett