Add + code handling logic for SMS Global Roaming

When sending SMS from international CDMA NANP country, outgoing SMS is failed due to + code converting.
(Send a SMS text message: to an international phone number using the plus code (+)).

In kitkat, when user send a sms with plus code, the "+" converted to 011(NANP_IDP_STRING). And it works well.
However, in lollipop, the "+" converted to current IDP, not NANP_IDP_STRING. And it failed to send the SMS.

I think, we need to seperate SMS and Call logic like cdmaCheckAndProcessPlusCodeForSms and cdmaCheckAndProcessPlusCode.
sohryun.shin@lge.com

Change-Id: Ie9d402cbeb4de4ac30299d5820b33909d0e40320

telephony/java/android/telephony/PhoneNumberUtils.java

@@ -2285,9 +2285,13 @@ public class PhoneNumberUtils
     }
 
     private static String getCurrentIdp(boolean useNanp) {
-        // in case, there is no IDD is found, we shouldn't convert it.
-        String ps = SystemProperties.get(
-                PROPERTY_OPERATOR_IDP_STRING, useNanp ? NANP_IDP_STRING : PLUS_SIGN_STRING);
+        String ps = null;
+        if(useNanp)
+            ps = NANP_IDP_STRING;
+        else{
+            // in case, there is no IDD is found, we shouldn't convert it.
+            ps = SystemProperties.get(PROPERTY_OPERATOR_IDP_STRING, PLUS_SIGN_STRING);                
+        }
         return ps;
     }