Maintenance and bugfixes

[sndnv]

• [client-android] Fixed various issues with caching
• [client-android] Small bug fixes and UI improvements
• Fixed client install/uninstall scripts

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.92%. Comparing base (13181bd) to head (18d1f3f).
⚠️ Report is 9 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #68   +/-   ##
=======================================
  Coverage   99.92%   99.92%           
=======================================
  Files         380      380           
  Lines       12994    12994           
  Branches     1041      970   -71     
=======================================
  Hits        12984    12984           
  Misses         10       10           

Flag	Coverage Δ
python	99.70% <ø> (ø)
scala	99.96% <ø> (ø)

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