fix: prevent underflow error when parsing native asset fee and price

[derHowie]

Fixes BX-1629

What changed (plus any additional context for devs)

Changed how we parse native asset fee and price to prevent underflow errors thrown by bignumber.

Error: consolidatedTransactionsQueryFunction:  {
  "message": {
    "reason": "fractional component exceeds decimals",
    "code": "NUMERIC_FAULT",
    "fault": "underflow",
    "operation": "parseFixed"
  }
}

Screen recordings / screenshots

What to test

Grunt.eth has transactions that were blowing up tx history. Reference the slack thread if you want to find more example addresses to test.

[linear[bot]]

BX-1629 Wallet balance and transaction history not loading