[FEAT] Screenshot Warning

[gantunesr]

Description

Write a short description of the changes included in this pull request, also include relevant motivation and context. Have in mind the following questions,
1. What is the reason for the change?

Improve the security around SRP reveal.

2. What is the improvement/solution?

iOS specific. This PR adds a warning when the user takes a screenshot of their SRP or Private Key.

Changes:

• Introduction of react-native-detector v0.2.1 package
• Refactor of RevealPrivateCredential and move styles to a different file
• Refactor of ManualBackupStep1 and move styles to a different file

it also refactors the component RevealPrivateCredential and ManualBackupStep1

Screenshots/Recordings

If applicable, add screenshots and/or recordings to visualize the before and after of your change

RPReplay_Final1657683451.MP4

Note: You can observe a similar behaviour in the onboarding flow.

Issue

Progresses https://github.com/MetaMask/mobile-planning/issues/227

Checklist

• There is a related GitHub issue
• Tests are included if applicable
• Any added code is fully documented

[cortisiko]

This PR is 🌮 🌮 .

Scenarios covered outside of the AC mentioned here:

• A user attempts to take a screenshot while his language is not set to English. Ensuring that the text in the warning alert defaults to English
• Regression on android. Nothing is broken there.