res/xml/style_settings.xml

<?xml version="1.0" encoding="utf-8"?>
<!--  Copyright (C) 2017-2018 The OmniROM Project

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
-->
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:settings="http://schemas.android.com/apk/res-auto"
        android:key="style_settings"
        android:title="@string/style_settings_title" >

    <PreferenceCategory
        android:key="category_theming"
        android:title="@string/theming_title">

        <Preference
            android:key="omni_theme_select_activity"
            android:title="@string/omni_theme_select_title"
            android:summary="@string/omni_theme_select_summary"
            android:persistent="false" >
            <intent android:action="android.intent.action.MAIN"
                    android:targetPackage="org.omnirom.omnistyle"
                    android:targetClass="org.omnirom.omnistyle.BrowseThemesActivity" />
        </Preference>
    </PreferenceCategory>
</PreferenceScreen>