Set row heights for browse rows.

Set a size on the text_bg so the cards appear at the correct size.

Change-Id: Ic2a836431485aaaea922a6bb3868e3e937f1ec21
diff --git a/samples/SupportLeanbackDemos/src/com/example/android/leanback/BrowseFragment.java b/samples/SupportLeanbackDemos/src/com/example/android/leanback/BrowseFragment.java
index 247af72..ce019b3 100644
--- a/samples/SupportLeanbackDemos/src/com/example/android/leanback/BrowseFragment.java
+++ b/samples/SupportLeanbackDemos/src/com/example/android/leanback/BrowseFragment.java
@@ -54,7 +54,14 @@
     }
 
     private void setupRows() {
-        mRowsAdapter = new ArrayObjectAdapter(new ListRowPresenter());
+        ListRowPresenter lrp = new ListRowPresenter();
+        float density = getActivity().getResources().getDisplayMetrics().density;
+        float height = 160 * density + 0.5f;
+        float expandedHeight = height + 52 * density + 0.5f;
+        lrp.setRowHeight((int)height);
+        lrp.setExpandedRowHeight((int)expandedHeight);
+
+        mRowsAdapter = new ArrayObjectAdapter(lrp);
 
         for (int i = 0; i < NUM_ROWS; ++i) {
             ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(new CardPresenter());