Make CellBroadcastService a non-persistent app

On Go targets, CellBroadcastService runs in phone process. This causes
a conflict with PhoneApp, which is also persistent, and leads to a delay
in PhoneApp's objects from being created during system start. Fix this
by making CellBroadcastService non-persistent.

Change-Id: Ifc1330be311d38077dcfbd0d707a3c533fa0d2e9
CRs-Fixed: 3057926
1 file changed