fix(#14716): fix send invalid hex data

[GustavoRSSilva]

Description

At the moment it is possible to try to send invlid ehx data, just to be blocked on the next step, prevent to move the screen with invalid hex data

Related issues

Fixes: #14716

Manual testing steps

1. Go to sent page
2. add hex data
3. Try to send invalid hex data

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[metamaskbot]

Builds ready [cea0d21]

• builds: chrome, firefox
• builds (flask): chrome, firefox
• builds (MMI): chrome
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7, 8
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
  • content-script: 0
  • offscreen: 0

Page Load Metrics (4909 ± 1938 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	478	14813	4162	3721	1787
		domContentLoaded	1733	14562	4476	3904	1875
		load	1777	14838	4909	4036	1938
		domInteractive	29	1969	284	482	231
		backgroundConnect	50	1171	428	367	176
		firstReactRender	17	270	93	72	34
		getState	27	634	185	186	89
		initialActions	0	1	0	0	0
		loadScripts	1270	14088	3795	3849	1848
		setupStore	11	489	100	121	58
		uiStartup	2040	15865	6609	4319	2074

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 0 Bytes (0.00%)
• ui: 612 Bytes (0.01%)
• common: 532 Bytes (0.00%)

[vinnyhoward]

LGTM!