Increase code coverage for NotificationChannel

Test: this
Fixes: 149361682
Change-Id: I389ccd71c0e2a56225661c59fa4365eb4551b95c
diff --git a/tests/app/src/android/app/cts/NotificationChannelTest.java b/tests/app/src/android/app/cts/NotificationChannelTest.java
index 184f678..2cc965f 100644
--- a/tests/app/src/android/app/cts/NotificationChannelTest.java
+++ b/tests/app/src/android/app/cts/NotificationChannelTest.java
@@ -225,4 +225,11 @@
         channel.setImportantConversation(true);
         assertTrue(channel.isImportantConversation());
     }
+
+    public void testHasUserSetSound() {
+        NotificationChannel channel = new NotificationChannel("a", "a", IMPORTANCE_DEFAULT);
+        channel.lockFields(NotificationChannel.USER_LOCKED_SOUND);
+
+        assertTrue(channel.hasUserSetSound());
+    }
 }