Emit Glean pings on addon, message state changes

[lesleyjanenorton]

Description

Describe your changes

Reference

i.e Jira or Github issue URL

Checklist

• [ ] My code follows the style guidelines for this project
• [ ] I have not added any packages that contain high risk or unknown licenses (GPL, LGPL, MPL, etc. consult with DevOps if in question)
• [ ] I have performed a self review of my own code
• [ ] I have commented my code PARTICULARLY in hard to understand areas
• [ ] I have added thorough tests where needed

[codecov-commenter]

Codecov Report

Base: 28.79% // Head: 16.52% // Decreases project coverage by -12.26% :warning:

Coverage data is based on head (feaf6f6) compared to base (f975fc2). Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #4487       +/-   ##
===========================================
- Coverage   28.79%   16.52%   -12.27%     
===========================================
  Files         252       71      -181     
  Lines       14242     3679    -10563     
  Branches     8081     1765     -6316     
===========================================
- Hits         4101      608     -3493     
+ Misses       4216     2760     -1456     
+ Partials     5925      311     -5614     

Flag	Coverage Δ
lottie_tests	56.33% <ø> (ø)
qml_tests	7.63% <ø> (ø)
unit_tests	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/hkdf.h	0.00% <0.00%> (-100.00%)	:arrow_down:
src/urlopener.h	0.00% <0.00%> (-100.00%)	:arrow_down:
src/pinghelper.h	0.00% <0.00%> (-100.00%)	:arrow_down:
src/models/server.h	0.00% <0.00%> (-100.00%)	:arrow_down:
src/update/updater.h	0.00% <0.00%> (-100.00%)	:arrow_down:
src/models/featuremodel.h	0.00% <0.00%> (-100.00%)	:arrow_down:
src/ipaddress.h	0.00% <0.00%> (-80.00%)	:arrow_down:
src/logger.h	25.00% <0.00%> (-62.50%)	:arrow_down:
src/task.h	0.00% <0.00%> (-60.00%)	:arrow_down:
tests/unit/mocinspectorhandler.cpp	0.00% <0.00%> (-50.00%)	:arrow_down:
... and 209 more

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