Add CellBroadcastReceiver

Adds back cellbroadcastreceiver.apk to allow weather and other alerts to be
received

Change-Id: I223229f29fa2ab71b6aeac1d0acded9e90e8298a

Conflicts:

	configs/gsm.mk
	configs/vzw.mk
	overlay/common/frameworks/base/core/res/res/values/config.xml