Wire-up default force-dark based off of isLightTheme

Bug: 102591313
Test: Compared settings in light & dark UI modes with
force_dark set to true. Observed that force_dark fixes
were not present when UI mode was set to dark, indicating
force_dark was appropriately globally-disabled

Change-Id: I5882829bb5871829fc8fc9911682f52a6ba5f445
diff --git a/libs/hwui/Properties.h b/libs/hwui/Properties.h
index ea017a7..542bc71 100644
--- a/libs/hwui/Properties.h
+++ b/libs/hwui/Properties.h
@@ -192,6 +192,8 @@
 
 #define PROPERTY_FORCE_DARK "debug.hwui.force_dark"
 
+#define PROPERTY_ENABLE_FORCE_DARK "debug.hwui.force_dark_enabled"
+
 ///////////////////////////////////////////////////////////////////////////////
 // Misc
 ///////////////////////////////////////////////////////////////////////////////
@@ -266,6 +268,7 @@
 
     static bool skpCaptureEnabled;
     static bool forceDarkMode;
+    static bool enableForceDarkSupport;
 
     // For experimentation b/68769804
     ANDROID_API static bool enableRTAnimations;