Add toString to CallServiceDescriptor

Change-Id: I847dbd8cf965516ad45f91d2db5df19469e2a2f8

telecomm/java/android/telecomm/CallServiceDescriptor.java

@@ -22,6 +22,7 @@ import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.Log;
 
+import java.util.Locale;
 import java.util.UUID;
 
 /**
@@ -123,6 +124,13 @@ public final class CallServiceDescriptor implements Parcelable {
                 mNetworkType == descriptor.mNetworkType;
     }
 
+    @Override
+    public String toString() {
+        return String.format(Locale.US, "[%s, component: %s]",
+                CallServiceDescriptor.class.getSimpleName(),
+                mComponentName == null ? "null" : mComponentName.flattenToShortString());
+    }
+
     /**
      * @param context {@link Context} to use for the construction of the {@link Builder}.
      * @return A new {@link Builder} instance.