Dialer: allow framework to do dark theming automatically

Change-Id: I5b840ba257adda69882e1fe19a55510802c45106
Signed-off-by: Jesse Chan <jc@lineageos.org>
diff --git a/java/com/android/dialer/theme/base/res/values/theme_dialer_light.xml b/java/com/android/dialer/theme/base/res/values/theme_dialer_light.xml
index 6c1aac5..50bfe37 100644
--- a/java/com/android/dialer/theme/base/res/values/theme_dialer_light.xml
+++ b/java/com/android/dialer/theme/base/res/values/theme_dialer_light.xml
@@ -38,6 +38,7 @@
 
   <!-- Activities and Applications should inherit from one of the themes above. -->
   <style name="Dialer.ThemeBase">
+    <item name="android:forceDarkAllowed">true</item>
     <!-- These values should be used to color all backgrounds. -->
     <item name="android:colorBackground">@color/dialer_background_color</item>
     <item name="android:colorBackgroundFloating">@android:color/white</item>