Remove dependency to Android Gradle Plugin in build scripts

[moallemi]

Fixes #59

[codecov]

Codecov Report

Base: 80.00% // Head: 79.64% // Decreases project coverage by -0.35% ⚠️

Coverage data is based on head (a5ae321) compared to base (f991e20).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #66      +/-   ##
============================================
- Coverage     80.00%   79.64%   -0.36%     
  Complexity       66       66              
============================================
  Files             8        8              
  Lines           170      167       -3     
  Branches         32       31       -1     
============================================
- Hits            136      133       -3     
  Misses           15       15              
  Partials         19       19              

Flag	Coverage Δ
unittests	79.64% <100.00%> (-0.36%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...advancedbuildversion/utils/CompatibilityManager.kt	90.90% <100.00%> (-1.10%)	⬇️

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