Trusted Entitlements: Enable enforced mode

[tonidero]

Description

This adds the enforced mode to the public API. I've also retested it manually to make sure the behavior is expected.

• Holding until we're ready to ship this.

[codecov]

Codecov Report

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

Comparison is base (15660d7) 83.89% compared to head (bb740eb) 83.88%.

Files	Patch %	Lines
...s/common/verification/SignatureVerificationMode.kt	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1485      +/-   ##
==========================================
- Coverage   83.89%   83.88%   -0.01%     
==========================================
  Files         212      212              
  Lines        7016     7018       +2     
  Branches     1013     1014       +1     
==========================================
+ Hits         5886     5887       +1     
  Misses        731      731              
- Partials      399      400       +1     

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