Create android test apps to test Android SDK regressions

[tonidero]

Description

We recently updated a library that actually made us incompatible with apps targeting android 33. We shouldn't inadvertently change that, so we are adding these simple apps which only need to be compiled to verify we are still compatible with the target versions for purchases-android and purchases-ui.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.44%. Comparing base (1538815) to head (7f0fe62). Report is 141 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1648   +/-   ##
=======================================
  Coverage   83.44%   83.44%           
=======================================
  Files         221      221           
  Lines        7476     7476           
  Branches     1050     1050           
=======================================
  Hits         6238     6238           
  Misses        827      827           
  Partials      411      411           

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