Modified MultiSim APIs

Capitalize S in Multisim.
isMultiSimSupported should return three states, to describe the three possible cases
(hardware not supported, hardware supported but carrier restricted, available)

Bug: 128524079
Test: compilation
Change-Id: Ic52496e326d1398384e5fe22587a236e5352fc4f

src/com/android/settings/RadioInfo.java

@@ -1571,7 +1571,8 @@ public class RadioInfo extends Activity {
     }
 
     private static boolean isDsdsSupported() {
-        return TelephonyManager.getDefault().isMultisimSupported();
+        return (TelephonyManager.getDefault().isMultiSimSupported()
+            == TelephonyManager.MULTISIM_ALLOWED);
     }
 
     private static boolean isDsdsEnabled() {