Make sdr white point do a thing

Bug: 182312559
Test: SilkFX prototype changes

Change-Id: Ieca0e4c8e2229d14aac460945702d23759d208e9
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index cf1a545..8523b1a 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -271,6 +271,10 @@
 
     static constexpr SkipInitializationTag SkipInitialization;
 
+    // Whether or not SDR layers should be dimmed to the desired SDR white point instead of
+    // being treated as native display brightness
+    static bool enableSdrDimming;
+
     // must be called before clients can connect
     void init() ANDROID_API;