Add activity practice session 2
Add assignment session for activity and fragment 3
Add image for screen density chart
Rename chart and add
Fix layout for assignment
Fix some screenshots for action bar
Additional fixture for screenshot
Modify images for actionbar item
Implement additional lifecycle assignment
Implement string resource practice session
Implement 2nd practice session for string resource
Implement string resource assignment
Add drawable practice session
Add assignment for drawable
Add practice session for animation resource