update version no
start to preserve quiz on screen rotate
CLOSED - task 238: Revisit how the start/end times are being
started/stopped 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/238
CLOSED - task 239: Revisit how logging media time taken in being
recorded 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/239
CLOSED - task 235: On screen rotate during quiz resets back to first
question 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/235
CLOSED - task 144: How to record time spent on resource activities 
https://github.com/DigitalCampus/oppia-mobile-android/issues/issue/144
ensure state prefs from widgets are destroyed