Show a checkmark on the default selected item.

This is a temporary asset.

Change-Id: Idd52bb3415fd860c59600938696b9fc2d996dc06
diff --git a/res/drawable-hdpi/chip_checkmark.png b/res/drawable-hdpi/chip_checkmark.png
new file mode 100644
index 0000000..cac823b
--- /dev/null
+++ b/res/drawable-hdpi/chip_checkmark.png
Binary files differ
diff --git a/res/drawable-mdpi/chip_checkmark.png b/res/drawable-mdpi/chip_checkmark.png
new file mode 100644
index 0000000..cac823b
--- /dev/null
+++ b/res/drawable-mdpi/chip_checkmark.png
Binary files differ
diff --git a/res/layout/chips_alternate_selected_item.xml b/res/layout/chips_alternate_selected_item.xml
index 6e0f271..cbb3ad9 100644
--- a/res/layout/chips_alternate_selected_item.xml
+++ b/res/layout/chips_alternate_selected_item.xml
@@ -58,4 +58,11 @@
                   android:singleLine="true"
                   android:ellipsize="end" />
     </LinearLayout>
+    <ImageView
+        android:id="@android:id/icon"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_margin="4dip"
+        android:src="@drawable/chip_checkmark"
+        android:gravity="right" />
 </LinearLayout>