Add seekbar and list settings preferences

Taken from AICP

res/values/seekbar_preference_strings.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/**
+ * Copyright (C) 2017 AICP
+ *
+ * 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 xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+
+    <string name="seekbar_no_default_value">No default value set</string>
+    <string name="seekbar_default_value_set">Value set to default of <xliff:g id="number">%d</xliff:g></string>
+    <string name="seekbar_default_value_already_set">Default value is already set</string>
+    <string name="seekbar_default_string">Default</string>
+
+</resources>