feat: Use fixed corner radius value

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

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

    <solid android:color="@color/e_launcher_widget_background" />

    <corners android:radius="15dp" />

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

    <padding

        android:bottom="0dp"

        android:left="0dp"

    android:layout_marginHorizontal="@dimen/widget_page_all_padding"

    android:layout_marginVertical="@dimen/widget_page_top_bottom_padding"

    android:paddingTop="@dimen/widget_page_all_padding"

    app:blurCornerRadius="15dp">

    app:blurCornerRadius="@dimen/default_widget_corner_radius">

    <LinearLayout

        android:layout_width="match_parent"

    <dimen name="widget_page_inset_padding">10dp</dimen>

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

    <dimen name="widget_page_top_bottom_padding">6dp</dimen>

    <dimen name="default_widget_corner_radius">15dp</dimen>

    <dimen name="settingslib_preferred_minimum_touch_target">48dp</dimen>

</resources>

    public RoundedWidgetView(Context context, boolean blurBackground) {

        super(context);

        this.mContext = context;

        this.cornerRadius = context.getResources().getDimensionPixelSize(R.dimen.default_dialog_corner_radius);

        this.cornerRadius = context.getResources().getDimensionPixelSize(R.dimen.default_widget_corner_radius);

        if (blurBackground) {

            mBlurDelegate = new BlurViewDelegate(this, BlurWallpaperProvider.blurConfigWidget, null);

            mBlurDelegate.setBlurCornerRadius(cornerRadius);