Add logcat fragment

[lukpueh]

Due to the lack of proper user feedback, debugging requires to connect to the Android device and to use the command line utility adb logcat (or Android Studio).

It would be helpful to provide another view in the main activity that displays a Sensibility related system log.

Currently we only have one activity that renders the install view. I suggest to encapsulate the install view and a log view into two separate Android Fragments.

Here is a basic approach on how to read the logcat programmatically.