Add setings.gradle for HorizontalPaging sample

This file is needed to allow building from the top-level directory
for this sample.

Change-Id: Iabe64da896dca0738a7343d67086c5dd5dcc9feb
diff --git a/ui/views/HorizontalPaging/settings.gradle b/ui/views/HorizontalPaging/settings.gradle
new file mode 100644
index 0000000..892a596
--- /dev/null
+++ b/ui/views/HorizontalPaging/settings.gradle
@@ -0,0 +1 @@
+include ':HorizontalPaging'