Add maxVirtualDisplaySize to configStore

Change-Id: I2c97995edda77b0044d3eaf394080bf7be6c0d77
diff --git a/configstore/1.0/default/surfaceflinger.mk b/configstore/1.0/default/surfaceflinger.mk
index c28524b..0db5134 100644
--- a/configstore/1.0/default/surfaceflinger.mk
+++ b/configstore/1.0/default/surfaceflinger.mk
@@ -38,3 +38,7 @@
 ifeq ($(TARGET_FORCE_HWC_FOR_VIRTUAL_DISPLAYS),true)
     LOCAL_CFLAGS += -DFORCE_HWC_COPY_FOR_VIRTUAL_DISPLAYS
 endif
+
+ifneq ($(MAX_VIRTUAL_DISPLAY_DIMENSION),)
+    LOCAL_CFLAGS += -DMAX_VIRTUAL_DISPLAY_DIMENSION=$(MAX_VIRTUAL_DISPLAY_DIMENSION)
+endif