Move ERC721 token URI parsing into try catch block

[hashwarp]

PR Title

Move ERC721 token URI parsing into try catch block

Description

Move ERC721 token URI parsing into try catch block. I included a test but can omit if deemed bloat.

• FIXED:

  • Not all contract token URIs are valid/can be fetched, and we should have backwards compatibility because they usually cannot be redeployed

Checklist

• Tests are included if applicable
• Any added code is fully documented

Issue

Resolves metamask-extension#14589

[hashwarp]

Note: the code in the try/block was introduced on March 3rd and I think it was a simple oversight to not have wrapped the entirety of the new code (because none of these variables are required)

[mcmire]

@adonesky1 What do you think about this?

[FrederikBolding]

Closing as this was rectified in #834