[fenix] For https://github.com/mozilla-mobile/fenix/issues/23374 - Add Dialog and Banner to Layer 2 description

app/src/main/java/org/mozilla/fenix/theme/FirefoxTheme.kt

@@ -205,7 +205,7 @@ class FirefoxColors(
     // Default Screen, Search, Frontlayer background
     var layer1 by mutableStateOf(layer1)
         private set
-    // Card background, Menu background
+    // Card background, Menu background, Dialog, Banner
     var layer2 by mutableStateOf(layer2)
         private set
     // App Bar Top, App Bar Bottom, Frontlayer header

app/src/main/res/values-night/colors.xml

@@ -8,7 +8,7 @@
     <!-- Layers -->
     <!-- Default Screen, Search, Frontlayer background -->
     <color name="fx_mobile_layer_color_1">@color/photonDarkGrey80</color>
-    <!-- Card background, Menu background -->
+    <!-- Card background, Menu background, Dialog, Banner -->
     <color name="fx_mobile_layer_color_2">@color/photonDarkGrey50</color>
     <!-- App Bar Top, App Bar Bottom, Frontlayer header -->
     <color name="fx_mobile_layer_color_3" tools:ignore="UnusedResources">@color/photonDarkGrey60</color>

app/src/main/res/values/colors.xml

@@ -8,7 +8,7 @@
     <!-- Layers -->
     <!-- Default Screen, Search, Frontlayer background -->
     <color name="fx_mobile_layer_color_1">@color/photonLightGrey20</color>
-    <!-- Card background, Menu background -->
+    <!-- Card background, Menu background, Dialog, Banner -->
     <color name="fx_mobile_layer_color_2">@color/photonWhite</color>
     <!-- App Bar Top, App Bar Bottom, Frontlayer header -->
     <color name="fx_mobile_layer_color_3" tools:ignore="UnusedResources">@color/photonLightGrey10</color>