Make the constructor of TaskInfoHelper private

- The class has static methods only, so it doesn't need the constructor.

Bug: 201301077
Test: it builds
Change-Id: Ib6ec58aa28a3fcccf15463d464fb0c14bfee44d8
diff --git a/car-builtin-lib/api/module-lib-current.txt b/car-builtin-lib/api/module-lib-current.txt
index 9c2a9d5..2ea3ff5 100644
--- a/car-builtin-lib/api/module-lib-current.txt
+++ b/car-builtin-lib/api/module-lib-current.txt
@@ -39,7 +39,6 @@
   }
 
   public class TaskInfoHelper {
-    ctor public TaskInfoHelper();
     method public static int getDisplayId(@NonNull android.app.TaskInfo);
     method public static int getUserId(@NonNull android.app.TaskInfo);
     method public static boolean isVisible(@NonNull android.app.TaskInfo);
diff --git a/car-builtin-lib/src/android/car/builtin/app/TaskInfoHelper.java b/car-builtin-lib/src/android/car/builtin/app/TaskInfoHelper.java
index 5933ef7..a1cb92e 100644
--- a/car-builtin-lib/src/android/car/builtin/app/TaskInfoHelper.java
+++ b/car-builtin-lib/src/android/car/builtin/app/TaskInfoHelper.java
@@ -60,4 +60,8 @@
                 + " baseIntent=" + task.baseIntent + " baseActivity=" + task.baseActivity
                 + "}";
     }
+
+    private TaskInfoHelper() {
+        throw new UnsupportedOperationException("contains only static members");
+    }
 }