config: packages: build SHIFT-ThemesStub

Change-Id: I792cf2fea15cdf14c06e9a68443c2ce35400d846
diff --git a/config/packages.mk b/config/packages.mk
index 469fc8d..71c2b53 100644
--- a/config/packages.mk
+++ b/config/packages.mk
@@ -27,6 +27,10 @@
 # Themes - Fonts
 $(call inherit-product-if-exists, packages/overlays/SHIFT/fonts/fonts.mk)
 
+# Themes App
+PRODUCT_PACKAGES += \
+    SHIFT-ThemesStub \
+
 ifeq ($(WITH_GMS),true)
 
   # ShiftOS-G specific packages