Don't delete Android agent when transferring teams. (#37517)

[getvictor]

Related issue: Resolves #37440

Note, from manual testing, when moving host to a new team, it does NOT get the certs for the new team. We could fix this as part of this fix or in a separate PR.

Testing

• Added/updated automated tests
• QA'd all new/changed functionality manually

For unreleased bug fixes in a release candidate, one of:

• Confirmed that the fix is not expected to adversely impact load test results

Summary by CodeRabbit

• New Features
  • Added Fleet Agent integration for Android MDM devices
• Fleet Agent policies are now automatically constructed and applied to managed Android devices
• Fleet Agent configuration includes server URL, enrollment secrets, and certificate templates

_{✏️ Tip: You can customize this high-level summary in your review settings.}

(cherry picked from commit 5000723)

[codecov]

Codecov Report

❌ Patch coverage is 46.98795% with 44 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.93%. Comparing base (f97284c) to head (4f19557).
⚠️ Report is 1 commits behind head on rc-minor-fleet-v4.79.0.

Files with missing lines	Patch %	Lines
server/mdm/android/service/service.go	47.43%	36 Missing and 5 partials ⚠️
server/worker/software_worker.go	40.00%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@                    Coverage Diff                     @@
##           rc-minor-fleet-v4.79.0   #37590      +/-   ##
==========================================================
- Coverage                   65.94%   65.93%   -0.01%     
==========================================================
  Files                        2356     2356              
  Lines                      186904   186959      +55     
  Branches                     7968     7968              
==========================================================
+ Hits                       123250   123269      +19     
- Misses                      52396    52426      +30     
- Partials                    11258    11264       +6     

Flag	Coverage Δ
backend	67.75% <46.98%> (-0.02%)	⬇️

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