Minor fixes

[gavv]

• Remove versionCode and versionName from AAR (https://stackoverflow.com/questions/74519040/)
• Set default API level in android_docker.sh to 26 (same as minSdkVersion in gradle)

[codecov[bot]]

Codecov Report

Merging #108 (b9d8c73) into main (5550d93) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #108   +/-   ##
=========================================
  Coverage     74.70%   74.70%           
  Complexity       79       79           
=========================================
  Files            24       24           
  Lines           419      419           
  Branches          2        2           
=========================================
  Hits            313      313           
  Misses          102      102           
  Partials          4        4