Minor fix on CarService.dump()

Bug: 150038159
Test: adb shell dumpsys car_service --services|wc

Change-Id: I81466537dbd8464a68925243e24b2647f38db14c
diff --git a/service/src/com/android/car/ICarImpl.java b/service/src/com/android/car/ICarImpl.java
index 5cf9090..661bc4f 100644
--- a/service/src/com/android/car/ICarImpl.java
+++ b/service/src/com/android/car/ICarImpl.java
@@ -666,7 +666,7 @@
             return;
         } else if ("--services".equals(args[0])) {
             if (args.length < 2) {
-                writer.print("Must pass services to dump when using --services");
+                writer.println("Must pass services to dump when using --services");
                 return;
             }
             int length = args.length - 1;