feat(youtube/theme): make dark the default color for dark theme background

src/main/kotlin/app/revanced/patches/youtube/layout/theme/patch/ThemePatch.kt

@@ -56,7 +56,7 @@ class ThemePatch : ResourcePatch {
         var darkThemeBackgroundColor: String? by option(
             PatchOption.StringOption(
                 key = "darkThemeBackgroundColor",
-                default = "@android:color/black",
+                default = "#FF282828",
                 title = "Background color for the dark theme",
                 description = "The background color of the dark theme. Can be a hex color or a resource reference.",
             )