Merge "Use groove for volume dialog slider" into main

<layer-list xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"

    android:paddingMode="stack" >

    <!-- The groove used for indicating max volume !-->

    <item android:id="@android:id/background"

        android:gravity="center_vertical|fill_horizontal">

        <inset

            android:insetLeft="@dimen/rounded_slider_track_inset"

            android:insetRight="@dimen/rounded_slider_track_inset" >

        <shape>

            <size android:height="@dimen/volume_dialog_track_width" />

                <corners android:radius="@dimen/volume_dialog_track_corner_radius" />

                <solid android:color="?androidprv:attr/colorAccentSecondaryVariant" />

            <corners android:radius="@dimen/volume_dialog_panel_width_half" />

            <solid android:color="?androidprv:attr/materialColorOutlineVariant" />

        </shape>

        </inset>

    </item>

    <item android:id="@android:id/progress"

        android:gravity="center_vertical|fill_horizontal">

    <!-- (volume_dialog_panel_width - rounded_slider_icon_size) / 2 -->

    <dimen name="volume_slider_icon_inset">11dp</dimen>

    <dimen name="volume_dialog_track_width">4dp</dimen>

    <dimen name="volume_dialog_track_width">40dp</dimen>

    <dimen name="volume_dialog_track_corner_radius">2dp</dimen>