Merge "Improve wallpaper background blur parameters" into udc-qpr-dev

    <!-- Blur radius for the Option 3 in R.integer.config_letterboxBackgroundType. Values < 0 are

        ignored and 0 is used. -->

    <dimen name="config_letterboxBackgroundWallpaperBlurRadius">24dp</dimen>

    <dimen name="config_letterboxBackgroundWallpaperBlurRadius">38dp</dimen>

    <!-- Alpha of a black translucent scrim showed over wallpaper letterbox background when

        the Option 3 is selected for R.integer.config_letterboxBackgroundType.

        Values < 0 or >= 1 are ignored and 0.0 (transparent) is used instead. -->

    <item name="config_letterboxBackgroundWallaperDarkScrimAlpha" format="float" type="dimen">

        0.75

        0.54

    </item>

    <!-- Corners appearance of the letterbox background.