SipPhone: switch to its own phone type PHONE_TYPE_SIP.

Change-Id: Ie33cfe92e59665864dbebbb38895e8e85f6db2e6
diff --git a/telephony/java/com/android/internal/telephony/sip/SipPhoneBase.java b/telephony/java/com/android/internal/telephony/sip/SipPhoneBase.java
index 4b7e991..9098e6f 100755
--- a/telephony/java/com/android/internal/telephony/sip/SipPhoneBase.java
+++ b/telephony/java/com/android/internal/telephony/sip/SipPhoneBase.java
@@ -176,8 +176,7 @@
     }
 
     public int getPhoneType() {
-        // FIXME: add SIP phone type
-        return Phone.PHONE_TYPE_GSM;
+        return Phone.PHONE_TYPE_SIP;
     }
 
     public SignalStrength getSignalStrength() {