Fix "4byte setting makes a call to 4byte when the setting..." flaky tests

[hjetpoluru]

https://app.circleci.com/pipelines/github/MetaMask/metamask-extension/112020/workflows/76a24e70-b862-47ad-86f6-3ea122532396/jobs/4194402/tests

test-e2e-firefox
Test path - /test/e2e/tests/settings/4byte-directory.spec.js
Test Scenario - 4byte setting makes a call to 4byte when the setting is on

Error: No window found by background script with title: MetaMask Dialog
    at ServerMochaToBackground.receivedMessage (test/e2e/background-socket/server-mocha-to-background.ts:2:2485)
    at ws.onmessage (test/e2e/background-socket/server-mocha-to-background.ts:2:1916)
    at callListener (node_modules/ws/lib/event-target.js:290:14)
    at WebSocket.onMessage (node_modules/ws/lib/event-target.js:209:9)
    at WebSocket.emit (node:events:519:28)
    at WebSocket.emit (node:domain:488:12)
    at Receiver.receiverOnMessage (node_modules/ws/lib/websocket.js:1220:20)
    at Receiver.emit (node:events:519:28)
    at Receiver.emit (node:domain:488:12)
    at Receiver.dataMessage (node_modules/ws/lib/receiver.js:596:14)
    at Receiver.getData (node_modules/ws/lib/receiver.js:496:10)
    at Receiver.startLoop (node_modules/ws/lib/receiver.js:167:16)
    at Receiver._write (node_modules/ws/lib/receiver.js:94:10)
    at writeOrBuffer (node:internal/streams/writable:570:12)
    at _write (node:internal/streams/writable:499:10)
    at Writable.write (node:internal/streams/writable:508:10)
    at Socket.socketOnData (node_modules/ws/lib/websocket.js:1355:35)
    at Socket.emit (node:events:519:28)
    at Socket.emit (node:domain:488:12)
    at addChunk (node:internal/streams/readable:559:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:510:3)
    at Readable.push (node:internal/streams/readable:390:5)
    at TCP.onStreamRead (node:internal/stream_base_commons:191:23)