Avoid duplicate definition for selection stroke.
Avoid duplicate definition of dimensions.
Merge pull request #77 from johnjohndoe/refactor-lecture-drawables

Refactor lecture drawables
Use designtime layout attributes.
Expand alarm list item to left and right border.

+ Update padding, re-use padding definition across different layouts:
  + alarms.xml refers to values/dimens.xml = 16dp, 16dp before
  + alarms_land_large.xml refers to values/dimens.xml = 32dp, 64dp before
  + alarms_large.xml refers to values/dimens.xml = 64dp, 48dp before
Remove redundant layout files used for alarm list.