NT-2144: Emulator on CI environment

[Arkariang]

📲 What

• New Job for Snapshot testing
• Adopted as CI environment Android Machine Executor and the orb 1.0.3 https://circleci.com/docs/2.0/android-machine-image/?section=executors-and-images#examples .
• Some of the emulator scripts have also been modified, they assume you have on your path:
  export ANDROID_HOME=/Users/{YOUR_USER}/Library/Android/sdk export PATH=${PATH}:$ANDROID_HOME/emulator:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools:$ANDROID_HOME/tools/bin:$ANDROID_HOME/tools/lib
  see -> https://app.getguru.com/card/i4zdyAqT/-Android-Screenshot-test-and-emulator-commands

🤔 Why

• Screenshot tests need to run on an emulator with specific configurations loaded, see /script/emulator/copy_emulator_configuration.sh and ./script/emulator/screenshot_config_emulator.sh
• The other scripts for creating/starting/stopping emulators are no longer meant to be used on CI(only local environment), as the orb provides that same functionality.
• See https://app.getguru.com/card/cb9qjL7i/-Android-CircleCI-environment-for-Android-UI-testing

👀 See

• All the steps to create/run/configure the simulator for screenshot tests
  

• Screenshot test job and unit test hob running on parallel

• The simulator has been launched and it's completely booted.

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📋 QA

• Run the CI job again and take a look at the logs to check all the steps are correct.

Story 📖

NT-2144

[codecov]

Codecov Report

Merging #1341 (6932d09) into master (1898158) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1341   +/-   ##
=========================================
  Coverage     74.16%   74.16%           
  Complexity      743      743           
=========================================
  Files           221      221           
  Lines          6669     6669           
  Branches        409      409           
=========================================
  Hits           4946     4946           
  Misses         1584     1584           
  Partials        139      139           

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[hadia]

Working after merge branch 🎉🎉