Adding a Google Consent tranformation plugin.

[didiergarcia]

Add a sample plugin to convert from arbitrary consent key/values to the Google Consent approved key/values.

See: https://developers.google.com/tag-platform/security/guides/app-consent?consentmode=basic&platform=android

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.54%. Comparing base (e4af729) to head (5a01ab2).
⚠️ Report is 62 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #210      +/-   ##
============================================
- Coverage     78.63%   78.54%   -0.10%     
+ Complexity      498      495       -3     
============================================
  Files            78       78              
  Lines          6586     6586              
  Branches        833      833              
============================================
- Hits           5179     5173       -6     
- Misses          735      739       +4     
- Partials        672      674       +2     

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