Fix to show signal strength as 0 if out of service.

Bug: 17942583
Change-Id: I399e5352b4585cff42ee5c7dd164315c1797110a

src/com/android/settings/deviceinfo/Status.java

@@ -546,6 +546,7 @@ public class Status extends PreferenceActivity {
             if ((ServiceState.STATE_OUT_OF_SERVICE == state) ||
                     (ServiceState.STATE_POWER_OFF == state)) {
                 mSignalStrength.setSummary("0");
+                return;
             }
 
             int signalDbm = mPhoneStateReceiver.getSignalStrengthDbm();