How Amplify works section is web specific for all platforms

[atierian]

Describe the content issue:
The content on the How Amplify works page is web specific and mostly doesn't apply to the Android, Flutter, or Swift platform libraries.

Examples:

• The flow diagram shows only Vue | React | Next in the Your frontend box.
• The code examples in the Building an app section of that page are all in JavaScript.
• The UI building section covers Figma designs -> React component generation, which is irrelevant for Android, Flutter, and Swift.
• The diagram in the Amplify architecture example section shows a Web app as the frontend.

URL page where content issue is:

• https://docs.amplify.aws/android/how-amplify-works/
• https://docs.amplify.aws/flutter/how-amplify-works/
• https://docs.amplify.aws/swift/how-amplify-works/