Fix: Detox is partially configured and is not working

[andreaforni]

The repository contains the e2e/ folder, the Detox configuration file (.detoxrc.json) and the scripts to build and run Detox tests on Android and iOS but:

• The Android section in .detoxrc.json is incomplete.
• The pre:test:android and test:androidscripts in package.json point to iOS configuration.
• All the Android setup described in Detox documentation is missing.
• There are no real e2e tests, the e2e/firstTest.spec.js contains a "hello world" test.