New minitab assets, and dithering fix.

The dithering flag we were setting in the layout was being overriden. We
are now setting it directly on the StateListDrawable in code.
diff --git a/src/com/android/contacts/BaseContactCardActivity.java b/src/com/android/contacts/BaseContactCardActivity.java
index 58ea990..ef84e69 100644
--- a/src/com/android/contacts/BaseContactCardActivity.java
+++ b/src/com/android/contacts/BaseContactCardActivity.java
@@ -233,6 +233,7 @@
         final LayoutInflater inflater = (LayoutInflater)parent.getContext().getSystemService(
                 Context.LAYOUT_INFLATER_SERVICE);
         final View tabIndicator = inflater.inflate(R.layout.tab_indicator, parent, false);
+        tabIndicator.getBackground().setDither(true);
 
         final TextView tv = (TextView) tabIndicator.findViewById(R.id.tab_title);
         tv.setText(label);