fix(DIA-561): Complete My Profile broken save in middle of the flow and UI adjustments

This PR relates to DIA-561

Description

This PR mainly fixes a bug when saving from the middle of the flow, the current screen didn't save its field correctly so I removed more logic from useCompleteProfile to work directly with the newly created store from easy-peasy since its performance is enough to have a smooth flow within the UI. Other relevant changes:

updates the store directly when adding an avatar to the user to simulate an optimistic response in the fragments that listened to(optimisticResponse was too much since we have 3 spreads in the mutation and the return when using it requires to return all properties used by the fragments)
UI corrections, spacing, missing border
Android keyboard layout issue fixed when using autoFocus with the input

Android

https://github.com/user-attachments/assets/16290591-caab-45e6-88ab-a45aa23d589b

iOS

https://github.com/user-attachments/assets/de8e20c3-3767-4e50-b59d-1547aaa3771b

PR Checklist

[x] I have tested my changes on iOS and Android.
[x] I hid my changes behind a feature flag, or they don't need one.
[x] I have included screenshots or videos, or I have not changed the UI.
[x] I have added tests, or my changes don't require any.
[x] I added an app state migration, or my changes do not require one.
[x] I have documented any follow-up work that this PR will require, or it does not require any.
[x] I have added a changelog entry below, or my changes do not require one.

To the reviewers 👀

[ ] I would like at least one of the reviewers to run this PR on the simulator or device.

Changelog updates

### Changelog updates #### Cross-platform user-facing changes - fix: complete my profile save during the flow and UI adjusts - araujobarret #### iOS user-facing changes - #### Android user-facing changes - #### Dev changes -

Need help with something? Have a look at our docs, or get in touch with us.

artsy / eigen