Blacklist Night display settings for testing

Bug: 38352336
Test: runtest --path
core/tests/coretests/src/android/provider/SettingsBackupTest.java -m
secureSettingsBackedUpOrBlacklisted
Change-Id: I9be8b1c0604482cbc59f90edd154ef7c641b3d56
diff --git a/core/tests/coretests/src/android/provider/SettingsBackupTest.java b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
index 7dc72db7..f02c45c 100644
--- a/core/tests/coretests/src/android/provider/SettingsBackupTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
@@ -17,24 +17,25 @@
 package android.provider;
 
 import static com.google.android.collect.Sets.newHashSet;
+
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.empty;
 import static org.hamcrest.Matchers.is;
+
 import static java.lang.reflect.Modifier.isFinal;
 import static java.lang.reflect.Modifier.isPublic;
 import static java.lang.reflect.Modifier.isStatic;
 
-import android.platform.test.annotations.Presubmit;
 import android.support.test.filters.SmallTest;
 import android.support.test.runner.AndroidJUnit4;
 
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.lang.reflect.Field;
 import java.util.HashSet;
 import java.util.Set;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 /** Tests that ensure appropriate settings are backed up. */
 @RunWith(AndroidJUnit4.class)
 @SmallTest
@@ -446,6 +447,8 @@
                  Settings.Secure.MANAGED_PROFILE_CONTACT_REMOTE_SEARCH,
                  Settings.Secure.MULTI_PRESS_TIMEOUT,
                  Settings.Secure.NFC_PAYMENT_FOREGROUND,
+                 Settings.Secure.NIGHT_DISPLAY_ACTIVATED,
+                 Settings.Secure.NIGHT_DISPLAY_LAST_ACTIVATED_TIME,
                  Settings.Secure.OVERVIEW_LAST_STACK_ACTIVE_TIME,
                  Settings.Secure.PACKAGE_VERIFIER_STATE,
                  Settings.Secure.PACKAGE_VERIFIER_USER_CONSENT,