Fix build due to missing import in Telecomm

Change-Id: Iede4656caae18620466dc2f6c1c7622db084a806
diff --git a/src/com/android/telecomm/CallServiceWrapper.java b/src/com/android/telecomm/CallServiceWrapper.java
index d334f62..5c9905e 100644
--- a/src/com/android/telecomm/CallServiceWrapper.java
+++ b/src/com/android/telecomm/CallServiceWrapper.java
@@ -22,6 +22,7 @@
 import android.telecomm.CallInfo;
 import android.telecomm.CallService;
 import android.telecomm.CallServiceDescriptor;
+import android.telecomm.TelecommConstants;
 
 import com.android.internal.telecomm.ICallService;
 import com.android.internal.telecomm.ICallServiceAdapter;