User-Agent isn't being properly set on Android

[Fatxx]

Describe the bug The userAgent property provided in Webview component is not being properly set in request headers by the HTTP interceptor.

Screenshots

To Reproduce Steps to reproduce the behavior

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior A clear and concise description of what you expected to happen

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• App Version [e.g. 1.0.0] - find version number in app from Settings > About MetaMask

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to be added after bug submission by internal support / PM Severity

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• Is this tech debt?