Convert sample project to Kotlin

[poliver]

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 94 lines in your changes missing coverage. Please review.
✅ Project coverage is 0.09%. Comparing base (be6e9ad) to head (2d62db0).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...htastic/android/meshserviceexample/MainActivity.kt	0.00%	94 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main   #3111      +/-   ##
========================================
- Coverage   0.09%   0.09%   -0.01%     
========================================
  Files        318     318              
  Lines      22019   22034      +15     
  Branches    2553    2554       +1     
========================================
  Hits          21      21              
- Misses     21995   22010      +15     
  Partials       3       3              

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