fix(IT Wallet): [SIW-1873] Fix useMaxBrightness flickering on iOS

[mastro993]

Short description

On iOS, displaying the QR Code of the Trustmark causes the screen brightness to flicker. This issue is due to a double animation triggered by an unexpected AppState change.
This PR introduces a check to prevent the double animation, ensuring smooth screen brightness transitions without flickering.

List of changes proposed in this pull request

• Added a check on app state change in useMaxBrigthness

How to test

Open the Trustmark QR Code modal on iOS, check that the brightness is not flickering and reaches the maximum value smoothly

[pagopa-github-bot]

Affected stories

• 🐞 SIW-1873: [io-app] La luminosità dello schermo "traballa" quando viene visualizzato il trustmark su iOS

Generated by 🚫 dangerJS against 9103480

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 48.14%. Comparing base (4f204b4) to head (9103480).
Report is 795 commits behind head on master.

Files with missing lines	Patch %	Lines
ts/utils/brightness.ts	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6466      +/-   ##
==========================================
- Coverage   48.42%   48.14%   -0.29%     
==========================================
  Files        1488     1629     +141     
  Lines       31617    32692    +1075     
  Branches     7669     7491     -178     
==========================================
+ Hits        15311    15740     +429     
- Misses      16238    16895     +657     
+ Partials       68       57      -11     

Files with missing lines	Coverage Δ
ts/utils/brightness.ts	4.41% <0.00%> (-8.93%)	⬇️

... and 1688 files with indirect coverage changes

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