omni: omnify the overlay stub

just add a simple omni theme for now

Change-Id: I3e5c4c36253f2a8cf8a74e493e5d269a70a4c40a
diff --git a/config/packages.mk b/config/packages.mk
index a880c21..4ea16f8 100644
--- a/config/packages.mk
+++ b/config/packages.mk
@@ -17,7 +17,7 @@
     webview
 
 PRODUCT_PACKAGES += \
-     StatixOverlayStub
+     OmniOverlayStub
 
 # Additional tools
 PRODUCT_PACKAGES += \