Add privacy report warning in NBGL Use Case

[nroggeman-ledger]

Description

The goal of this PR is to propose an implementation of the Security Report as initial warning page or during review (first and last page).
The content of this report can be automatically set using predefined values, or customized by providing all strings, icons and even menu navigation.

Changes include

• Bugfix (non-breaking change that solves an issue)
• [*] New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)
• Tests
• Documentation
• Other (for changes that might not fit in any category)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.43%. Comparing base (a2be76c) to head (ae99ee7).

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #840       +/-   ##
===========================================
+ Coverage   35.49%   60.43%   +24.94%     
===========================================
  Files          13       13               
  Lines        1606     1820      +214     
===========================================
+ Hits          570     1100      +530     
+ Misses       1036      720      -316     

Flag	Coverage Δ
unittests	60.43% <ø> (+24.94%)	⬆️

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