Add new downloads UI to core build.

Change-Id: I96a3bb10beb6c1ec9c48baa2e2039aab7c421b09
diff --git a/target/product/core.mk b/target/product/core.mk
index 6f93876..c2dbca0 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -62,6 +62,7 @@
     ApplicationsProvider \
     ContactsProvider \
     DownloadProvider \
+    DownloadProviderUi \
     MediaProvider \
     PicoTts \
     SettingsProvider \