Messaging: allow framework to do dark theming automatically

Change-Id: Ia213448239b279b9b4bd753e32b01956f0f9691f
diff --git a/res/values-v27/styles.xml b/res/values-v27/styles.xml
index ac23a16..22e94ed 100644
--- a/res/values-v27/styles.xml
+++ b/res/values-v27/styles.xml
@@ -16,6 +16,7 @@
 -->
 <resources>
     <style name="BugleBaseTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <item name="android:forceDarkAllowed">true</item>
         <item name="android:navigationBarColor">@color/navigation_bar_bg</item>
         <item name="android:navigationBarDividerColor">@color/navigation_bar_divider</item>
         <item name="android:windowLightNavigationBar">true</item>