Check at runtime if AndroidX.Core is available

[marandaneto]

📜 Description

Check at runtime if AndroidX.Core is available

💡 Motivation and Context

Closes #1711

💚 How did you test it?

running without androidxcore/unit test

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• No breaking changes

🔮 Next steps

[marandaneto]

docs PR getsentry/sentry-docs#4150

[codecov-commenter]

Codecov Report

Merging #1718 (fcf6a25) into main (7cd5740) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main    #1718   +/-   ##
=========================================
  Coverage     75.04%   75.04%           
  Complexity     2099     2099           
=========================================
  Files           211      211           
  Lines          7514     7514           
  Branches        791      791           
=========================================
  Hits           5639     5639           
  Misses         1492     1492           
  Partials        383      383           

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[maciejwalkowiak]

LGTM

[bruno-garcia]

This is great. I'm sure you were resistant to do the runtime check with reflection but I appreciate as it'll help the unity use case and others.