Add DeviceParts with most of Doze and Gestures features

Taken from oneplus6 and edit for our zenfone 6
diff --git a/DeviceParts/res/xml/main.xml b/DeviceParts/res/xml/main.xml
new file mode 100644
index 0000000..58377c4
--- /dev/null
+++ b/DeviceParts/res/xml/main.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Copyright (C) 2014-2016 The OmniROM 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.
+-->
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+    <Preference
+        android:key="gesture_category"
+        android:title="@string/category_gestures_title"
+        android:summary="@string/category_gestures_summary"
+        android:persistent="false" >
+        <intent android:action="android.intent.action.MAIN"
+                android:targetPackage="org.omnirom.device"
+                android:targetClass="org.omnirom.device.GestureSettingsActivity" />
+    </Preference>
+
+    <Preference
+        android:key="doze_category"
+        android:title="@string/doze_category_title"
+        android:summary="@string/doze_category_summary"
+        android:persistent="false" >
+        <intent android:action="android.intent.action.MAIN"
+                android:targetPackage="org.omnirom.device"
+                android:targetClass="org.omnirom.device.DozeSettingsActivity" />
+    </Preference>
+
+</PreferenceScreen>