ThemePicker: Fix ugly black/transparent bar under nav area

            android:name="com.android.customization.picker.CustomizationPickerActivity"

            android:label="@string/app_name"

            android:resizeableActivity="false"

            android:theme="@style/CustomizationTheme.NoActionBar">

            android:theme="@style/CustomizationTheme.NoActionBar.CustomizationPicker">

            <intent-filter>

                <action android:name="android.intent.action.SET_WALLPAPER"/>

        <item name="android:windowNoTitle">true</item>

        <item name="android:fitsSystemWindows">false</item>

        <item name="android:windowDrawsSystemBarBackgrounds">true</item>

    </style>

    <style name="CustomizationTheme.NoActionBar.CustomizationPicker" parent="CustomizationTheme.NoActionBar">

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

        <item name="android:windowContentOverlay">@null</item>

        <item name="android:windowDisablePreview">true</item>