Implement the avatar upload designs for the new onboarding

The profile screens for the mobile native onboarding need to have an avatar upload

• Design the new avatar upload
• Implement the new designs using the existing functionality for avatar upload on mobile native

We now have mocks for this: https://design.minds.com/hosted/mobile/michael/mobile%23-registration/ https://design.minds.com/hosted/mobile/michael/mobile%23-registration/#artboard6 https://design.minds.com/hosted/mobile/michael/mobile%23-registration/#artboard7