Fix typo in Call.Details.propertiesToString

Change-Id: I7bb52138912fddef20862f5f7a29a8ec2e0a1d66
diff --git a/telecomm/java/android/telecom/Call.java b/telecomm/java/android/telecom/Call.java
index a2e0706..e756a57 100644
--- a/telecomm/java/android/telecom/Call.java
+++ b/telecomm/java/android/telecom/Call.java
@@ -380,7 +380,7 @@
                 builder.append(" PROPERTY_HIGH_DEF_AUDIO");
             }
             if (hasProperty(properties, PROPERTY_EMERGENCY_CALLBACK_MODE)) {
-                builder.append(" EMERGENCY_CALLBACK_MODE");
+                builder.append(" PROPERTY_EMERGENCY_CALLBACK_MODE");
             }
             builder.append("]");
             return builder.toString();