Add CellBroadcastReceiver

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

Change-Id: I223229f29fa2ab71b6aeac1d0acded9e90e8298a
Use older PA Prefs for HDPI devices
Update squisher
V4.0: New RootBox bootanimation by Wiggierip