feat: AndroidShowDeprecations preference flag

[breautek]

Platforms affected

Android

Motivation and Context

Useful development tool for core android & plugin developers

Description

Introduces a new AndroidShowDeprecations preference flag, which when true it will enable deprecation prints in the build output. By default, the flag is false.

See apache/cordova-docs#1424 for documentation

Testing

Manual testing.

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.24%. Comparing base (b792326) to head (f278e2e).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1822   +/-   ##
=======================================
  Coverage   72.24%   72.24%           
=======================================
  Files          23       23           
  Lines        1841     1841           
=======================================
  Hits         1330     1330           
  Misses        511      511           

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[dpogue]

This seems very useful