fix: android example crashing on launch

[tyrauber]

Description

ReactNativeFlipper.initializeFlipper is no longer required in ReactNative >70. Calling initializeFlipper crashes the app on Launch.

Checklist

• [X] I have tested this on a device/simulator for each compatible OS
• [X] I formatted JS and TS files with running yarn lint:fix in the root folder
• [X] I have run tests via yarn test in the root folder
• [X] I updated the documentation with running yarn generate in the root folder
• [ ] I mentioned this change in CHANGELOG.md
• [ ] I updated the typings files (index.d.ts)
• [X] I added/updated a sample (/example)