overlay: tv: default to night mode

As rest of the UI is dark by default, making also apps dark by default
provides more consistent user experience.

Change-Id: I8da8ea57d67014a7629e6641fd7c75d20111ca0f

overlay/tv/frameworks/base/core/res/res/values/config.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/**
+ * Copyright (c) 2021, The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+-->
+<resources>
+    <!-- Control the default night mode to use when there is no other mode override set.
+         One of the following values (see UiModeManager.java):
+             0 - MODE_NIGHT_AUTO
+             1 - MODE_NIGHT_NO
+             2 - MODE_NIGHT_YES
+    -->
+    <integer name="config_defaultNightMode">2</integer>
+</resources>