PoorManThemes: create DocumentsUITheme

Change-Id: Idda6860020bcf0a4a0cee12e437fdfdb64c99096
diff --git a/config/packages.mk b/config/packages.mk
index 6c20725..4df7e01 100644
--- a/config/packages.mk
+++ b/config/packages.mk
@@ -49,6 +49,9 @@
     GboardOmniTheme
 
 PRODUCT_PACKAGES += \
+    DocumentsUITheme
+
+PRODUCT_PACKAGES += \
     NotificationsDark \
     NotificationsLight \
     NotificationsPrimary