Fix build, missing TelecommConstants import

Change-Id: Ib0313c8020812c2c5fcbe46b6ac18557ef784b53
diff --git a/src/com/android/telecomm/CallsManager.java b/src/com/android/telecomm/CallsManager.java
index b42e36c..4b4de71 100644
--- a/src/com/android/telecomm/CallsManager.java
+++ b/src/com/android/telecomm/CallsManager.java
@@ -24,6 +24,7 @@
 import android.telecomm.CallService;
 import android.telecomm.CallServiceDescriptor;
 import android.telecomm.CallState;
+import android.telecomm.TelecommConstants;
 import android.telephony.TelephonyManager;
 
 import com.android.internal.telecomm.ICallService;