Set itemShapeFillColor for Dracula nav drawer

On-device logcat showed a recoverable ResourcesCompat warning: the
NavigationView's @color/navigation_item ColorStateList self-references
?itemShapeFillColor, which the base theme never sets (only the Black theme
does). Set it on the Dracula day and night styles so the selected nav-drawer
item gets a proper Dracula-purple fill and the warning no longer fires.

Pre-existing on all non-Black themes; fixed here for the new Dracula theme.
Verified on Android: warning count 0, no crash.

Author: hawkff

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

@@ -26,6 +26,7 @@
         <item name="android:colorBackground">@color/dracula_background</item>
         <item name="colorOnBackground">@color/dracula_on_surface</item>
         <item name="android:windowBackground">@color/dracula_background</item>
+        <item name="itemShapeFillColor">@color/color_dracula</item>
     </style>
 
     <style name="Theme.SagerNet.Dialog.Dracula" parent="Theme.SagerNet.Dialog">
@@ -40,5 +41,6 @@
         <item name="colorOnSurface">@color/dracula_on_surface</item>
         <item name="android:colorBackground">@color/dracula_background</item>
         <item name="colorOnBackground">@color/dracula_on_surface</item>
+        <item name="itemShapeFillColor">@color/color_dracula</item>
     </style>
 </resources>

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

@@ -606,6 +606,9 @@
         <item name="colorMaterial100">@color/color_dracula_100</item>
         <item name="colorMaterial300">@color/color_dracula_300</item>
         <item name="cardElevatedSurfaceColor">@color/card_elevated_dracula</item>
+        <!-- Nav drawer selected-item fill; also satisfies the ?itemShapeFillColor
+             self-reference in @color/navigation_item. -->
+        <item name="itemShapeFillColor">@color/color_dracula</item>
     </style>
 
     <style name="Theme.SagerNet.Dialog.Black" parent="Theme.SagerNet.Dialog">
@@ -642,6 +645,7 @@
         <item name="colorMaterial100">@color/color_dracula_100</item>
         <item name="colorMaterial300">@color/color_dracula_300</item>
         <item name="cardElevatedSurfaceColor">@color/card_elevated_dracula</item>
+        <item name="itemShapeFillColor">@color/color_dracula</item>
     </style>
 
     <style name="Theme.Start" parent="Theme.MaterialComponents.DayNight">