fix: align tab styles in new scan screen

[bryce-mcmath]

Summary of Changes

This change aligns the tabs on the new scan screen with the existing main tabs, making use of the theme. I was unable to use the exact same components (from @react-navigation/bottom-tabs) because they depend on being used with actual screens, not just component views shared between one parent screen.

Old:

New:

Related Issues

N/A

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[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (23cd8a4) 61.30% compared to head (e562398) 61.33%.

Files	Patch %	Lines
packages/legacy/core/App/navigators/TabStack.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1033      +/-   ##
==========================================
+ Coverage   61.30%   61.33%   +0.03%     
==========================================
  Files         181      181              
  Lines        5522     5524       +2     
  Branches     1574     1575       +1     
==========================================
+ Hits         3385     3388       +3     
+ Misses       2113     2112       -1     
  Partials       24       24              

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