fix: Enabled Circular border around country Selector

[abhay1821]

What

• This PR includes fix of shape changes after the selection of the country is made.

Screenshot

Before Light Mode	After In Light Mode	After In Dark Mode

Fixes bug(s)

• Onboarding: Country selector doesn't have the same shape #1454

[codecov-commenter]

Codecov Report

Merging #1464 (9b7c8a0) into develop (53fb69c) will decrease coverage by 0.08%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           develop   #1464      +/-   ##
==========================================
- Coverage     9.13%   9.04%   -0.09%     
==========================================
  Files          158     158              
  Lines         6372    6432      +60     
==========================================
  Hits           582     582              
- Misses        5790    5850      +60     

Impacted Files	Coverage Δ
.../smooth_app/lib/pages/onboarding/welcome_page.dart	3.12% <0.00%> (-0.33%)	⬇️
...smooth_app/lib/pages/user_preferences_profile.dart	9.52% <0.00%> (-0.90%)	⬇️
packages/smooth_app/lib/pages/scan/scan_page.dart	2.50% <0.00%> (-0.28%)	⬇️
...mooth_app/lib/pages/user_preferences_settings.dart	7.87% <0.00%> (-0.13%)	⬇️
...smooth_app/lib/pages/product/new_product_page.dart	0.73% <0.00%> (-0.02%)	⬇️
packages/smooth_app/lib/pages/image_crop_page.dart	0.00% <0.00%> (ø)
...ges/smooth_app/lib/generic_lib/loading_dialog.dart	0.00% <0.00%> (ø)
...ges/smooth_app/lib/pages/product/summary_card.dart	0.00% <0.00%> (ø)
.../smooth_app/lib/data_models/onboarding_loader.dart	0.00% <0.00%> (ø)
...smooth_app/lib/pages/scan/search_history_view.dart	0.00% <0.00%> (ø)
... and 5 more

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[abhay1821]

Hi @M123-dev,
Could Please review it.

[M123-dev]

👍🏼