frameworks/base: Day and week on data usage (1/2)

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

Change-Id: I61b0aa3bdea015793928e4af2b8d8a79147a123e
Don't let apps disable the SIM PIN entry screen.

As the user (who controls the app behaviour after all) likely doesn't
see the PIN screen as a lock screen (he likely wants telephony) and the
PIN screen is not shown on a timer-driven basis, it should be treated
specially.

Change-Id: I8d48ab5f097bc926f67eab5835d9b5f1e581db15