Reinstated desugaring since it broke the build

Android gradle update - explicitly state build tools version, update to 32.0.0, remove desugaring.

Android gradle update - explicitly state build tools version, remove desugaring

By OptimizedForDensity:
- Add unit type to Civilopedia 
- Fix mod translation file generation 
- Fix bug related to resuming games 

By xlenstra:
- Added a hidden option for enabling espionage 
- Occupied cities have +2 extra unhappiness 
- Removes the option for disabling religion 
- Added 'without resource' conditional 
- Added a unique for destroying improvements on attack 

Add missing string to the translations template file  - By estorski

Made invisible units not become visible just by being next to an owned tile.  - By kralinc