Make sdr white point do a thing

Bug: 182312559
Test: SilkFX prototype changes

Change-Id: Ieca0e4c8e2229d14aac460945702d23759d208e9
diff --git a/services/surfaceflinger/SurfaceFlingerProperties.cpp b/services/surfaceflinger/SurfaceFlingerProperties.cpp
index b3dca78..4a69c8f 100644
--- a/services/surfaceflinger/SurfaceFlingerProperties.cpp
+++ b/services/surfaceflinger/SurfaceFlingerProperties.cpp
@@ -321,6 +321,10 @@
     return defaultValue;
 }
 
+bool enable_sdr_dimming(bool defaultValue) {
+    return SurfaceFlingerProperties::enable_sdr_dimming().value_or(defaultValue);
+}
+
 int32_t display_update_imminent_timeout_ms(int32_t defaultValue) {
     auto temp = SurfaceFlingerProperties::display_update_imminent_timeout_ms();
     if (temp.has_value()) {