TV: make volume UI opaque when not blurred

Blur is not always available, e.g. on low performance devices

Bug: 304555222
Test: manual - change volume on Boreal device, should be opaque
Change-Id: I7d7bdffb789413d96161a7559ac88aa020053888
diff --git a/res/values/colors.xml b/res/values/colors.xml
index 1e78e17..f484617 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 <resources>
-    <color name="volume_dialog_background_color">#E61F232B</color>
+    <color name="volume_dialog_background_color">#1E232C</color>
     <color name="volume_dialog_background_color_above_blur">#C71F232B</color>
 
     <color name="bottom_sheet_icon_color">#D2E3FC</color>