Implement new QA builds for both Android and iOS

[Fatxx]

Description

• This PR implements new QA apps for both Android and iOS;
• It adds two new workflows in Bitrise: ios_internal_release_step and android_internal_release_step;
• "About MetaMask" screen shows the current branch where the build was triggered from;

Screenshots/Recordings iOS: Android:

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

Issue

Progresses https://github.com/MetaMask/mobile-planning/issues/344 and https://github.com/MetaMask/mobile-planning/issues/345

Checklist

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

[github-actions[bot]]

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.

[gantunesr]