feat: [IOPID-1391] Fix tablet compatibility alert displaying

[shadowsheep1]

Short description

This PR fixes the continuously displaying of the Tablet compatibility alert during the login flow. It took the chance to refactor the LandingScreen from PureComponent to FunctionComponent.

Details

❌	✅
default.mov	default.mov

How to test

Launch the app on an Android Tablet and check that the Alert is shown only at every first render of LandingScreen.

[pagopa-github-bot]

Affected stories

• 🌟 IOPID-1391: Visualizzazione banner incompatibilità su Tablet
  subtask of
  • ⚡ IOPID-212: Debito Tecnico

Generated by 🚫 dangerJS against c016220

[codecov]

Codecov Report

Attention: 80 lines in your changes are missing coverage. Please review.

Comparison is base (46af866) 47.48% compared to head (c016220) 47.48%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5417      +/-   ##
==========================================
- Coverage   47.48%   47.48%   -0.01%     
==========================================
  Files        1604     1604              
  Lines       33578    33577       -1     
  Branches     8199     8197       -2     
==========================================
- Hits        15945    15944       -1     
  Misses      17575    17575              
  Partials       58       58              

Files	Coverage Δ
ts/navigation/AuthenticationNavigator.tsx	66.66% <ø> (ø)
ts/screens/authentication/LandingScreen.tsx	3.93% <1.23%> (-0.76%)	⬇️

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[Ladirico]

LGTM!