Settings: Day and week on data usage cycle (2/2)

Adds the ability to set day and week on when the data usage
graph resets, instead of just month.

Change-Id: I5974e1b7143d09ffd6fcd6db113c3f7511346bfa
Signed-off-by: scott <scott@ubuntu>

Conflicts:
	res/values/bam_arrays.xml