omni: add nature theme style

Change-Id: I37c81bb2acaa97772c3a926b206b1d2b7770e797
diff --git a/themes/overlays/Android.mk b/themes/overlays/Android.mk
index e7c0e5e..fde498e 100644
--- a/themes/overlays/Android.mk
+++ b/themes/overlays/Android.mk
@@ -24,10 +24,12 @@
 	PrimaryColorOmniBlackOverlay \
 	PrimaryColorDarkBlueOverlay \
 	PrimaryColorDeepBlueOverlay \
+	PrimaryColorDarkGreenOverlay \
 	AccentColorRedDevilOverlay \
 	FontLatoSourceOverlay \
 	FontMuliSourceOverlay \
-	EmptyOverlay
+	EmptyOverlay \
+	EmptyProductOverlay
 
 include $(BUILD_PHONY_PACKAGE)
 include $(CLEAR_VARS)