[Mobile] Fix issue with image inside input

Images inside input need some styles to be fixed (padding, etc.).

It should work like the icon in the example.

Reference to extension code doing the same thing: https://github.com/MetaMask/metamask-extension/blob/main/ui/components/app/snaps/snap-ui-renderer/index.scss#L37-L42

Snap JSX code that can be used for testing:
```xml

ETH

Whatever

Whatever

```

Start with the Snap JSX example in the issue and compare the image styling with the referenced extension code in index.scss. Locate the Snap UI renderer styles for images inside input-adjacent content, then verify the padding and alignment in the normal and error examples. Done means the image behaves like the example icon in all three cases.

Written by the indexing model from the issue text.