Adding customizable background colour support. am: eedebc48

<?xml version="1.0" encoding="utf-8"?>

<!-- Copyright (C) 2016 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");

     you may not use this file except in compliance with the License.

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     distributed under the License is distributed on an "AS IS" BASIS,

     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

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<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_accelerated="false" android:color="?attr/colorBackground" />

    <item android:color="@android:color/transparent" />

</selector>

 -->

<resources>

    <!-- Theme used for the intent picker activity. -->

    <style name="Theme.DeviceDefault.Resolver" parent="Theme.Material">

    <style name="Theme.DeviceDefault.Resolver" parent="Theme.DeviceDefault">

        <item name="colorControlActivated">?attr/colorControlHighlight</item>

        <item name="listPreferredItemPaddingStart">?attr/dialogPreferredPadding</item>

        <item name="listPreferredItemPaddingEnd">?attr/dialogPreferredPadding</item>

    </style>

    <!-- Use a dark theme for watches. -->

    <style name="Theme.DeviceDefault.System" parent="Theme.Material" />

    <style name="Theme.DeviceDefault.System" />

</resources>

    <color name="accent_device_default_light">@color/accent_material_light</color>

    <color name="accent_device_default_dark">@color/accent_material_dark</color>

    <color name="accent_device_default_50">@color/material_deep_teal_50</color>

    <color name="background_device_default_dark">@color/background_material_dark</color>

    <color name="background_device_default_light">@color/background_material_light</color>

    <color name="background_floating_device_default_dark">@color/background_floating_material_dark</color>

    <color name="background_floating_device_default_light">@color/background_floating_material_light</color>

    <color name="button_normal_device_default_dark">@color/btn_default_material_dark</color>

    <color name="button_normal_device_default_light">@color/btn_default_material_light</color>

</resources>