Finished Chapter 12 without the challenge
Added the easy challenge: write another dialog fragment named
TimePickerFragment that allows the user to select what time of day the
crime occurred using a TimePicker widget. Add another button to
CrimeFragment that will display a TimePickerFragment.
Adding changes to the challenge 2 of chapter 12.
Added challenge 2 of chapter 12. I made the update of the date and not
time because it was almost the same. ;)