Add Google Analytics for survey tracking

[rfontanarosa]

closes #1867

[codecov-commenter]

Codecov Report

❌ Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 59.37%. Comparing base (8475145) to head (7c241d2).

Files with missing lines	Patch %	Lines
...eb/src/app/services/analytics/analytics.service.ts	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2469      +/-   ##
==========================================
+ Coverage   59.32%   59.37%   +0.05%     
==========================================
  Files         113      114       +1     
  Lines        2793     2799       +6     
  Branches      422      423       +1     
==========================================
+ Hits         1657     1662       +5     
- Misses       1074     1075       +1     
  Partials       62       62              

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