Rename PROPERTY_SHOW_CALLBACK_NUMBER

This property actually reflects whether the call is in emergency
callback mode.

Change-Id: I6b8e92d10d844d39e0dffcf894db60e905c5f066
Fix: 30005987
diff --git a/src/com/android/services/telephony/TelephonyConnection.java b/src/com/android/services/telephony/TelephonyConnection.java
index 3810699..a445d79 100644
--- a/src/com/android/services/telephony/TelephonyConnection.java
+++ b/src/com/android/services/telephony/TelephonyConnection.java
@@ -738,7 +738,7 @@
         // shown.
         Phone phone = getPhone();
         if (phone != null && phone.isInEcm()) {
-            connectionProperties |= PROPERTY_SHOW_CALLBACK_NUMBER;
+            connectionProperties |= PROPERTY_EMERGENCY_CALLBACK_MODE;
         }
 
         return connectionProperties;