Make sdr white point do a thing

Bug: 182312559
Test: SilkFX prototype changes

Change-Id: Ieca0e4c8e2229d14aac460945702d23759d208e9
diff --git a/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop b/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
index ee5542d..78f8a2f 100644
--- a/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
+++ b/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
@@ -463,3 +463,12 @@
     access: Readonly
     prop_name: "ro.surface_flinger.enable_layer_caching"
 }
+
+# Enables SDR layer dimming
+prop {
+    api_name: "enable_sdr_dimming"
+    type: Boolean
+    scope: Public
+    access: Readonly
+    prop_name: "ro.surface_flinger.enable_sdr_dimming"
+}
\ No newline at end of file
diff --git a/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt b/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
index 47e14f6..9c567d6 100644
--- a/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
+++ b/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
@@ -53,6 +53,10 @@
     prop_name: "ro.surface_flinger.protected_contents"
   }
   prop {
+    api_name: "enable_sdr_dimming"
+    prop_name: "ro.surface_flinger.enable_sdr_dimming"
+  }
+  prop {
     api_name: "force_hwc_copy_for_virtual_displays"
     prop_name: "ro.surface_flinger.force_hwc_copy_for_virtual_displays"
   }