Add Vagrantfile to repo (creating env for running/debugging android app)

[emanuelb]

Vagrantfile can be added to repo, thus running vagrant up will open vm (can be in gui mode as well) that has all tools/deps installed for running android env (such as commands yarn android or npm run android, etc..) and also for compiling the app.
it can also contain Android-Studio to allow debugging of the running app.
The Containerfiles in #243 are only for building (will generate apk file, won't be able to run it, as there is no gui)