Add latest area info broadcast to Settings status screen.

When the SIM has a Brazilian country code, add an item to the
status screen to show the most recently received area info cell
broadcast, requested from CellBroadcastReceiver, which also
broadcasts any updates to the area info. To read the area info
broadcast or request it from CellBroadcastReceiver requires
READ_PHONE_STATE permission.

Bug: 7445881
Change-Id: I387e23ecd0802b212ecb3e44f900a3a7a4b27e76