Flip the *other* flag

Bug: 17287256
Change-Id: Id5ca91f3a419cbc66351799b764b042a086f91b5
diff --git a/device-common.mk b/device-common.mk
index 1e31c24..86dac63 100644
--- a/device-common.mk
+++ b/device-common.mk
@@ -30,6 +30,10 @@
     tf.enable=y \
     drm.service.enabled=true
 
+# libhwui flags
+PRODUCT_PROPERTY_OVERRIDES += \
+    debug.hwui.render_dirty_regions=false
+
 # Set default USB interface
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += \
     persist.sys.usb.config=mtp