Test for issue #2226370: Resource versions match with equality

Adds tests to ensure that version number is being handled correctly.
Also fixed build to include required density resources.

Change-Id: Ia201d9e9ed7603c69ad12d79098f8584479f28fe
diff --git a/tests/res/values-v13/strings.xml b/tests/res/values-v13/strings.xml
new file mode 100644
index 0000000..d71936a
--- /dev/null
+++ b/tests/res/values-v13/strings.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2008 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+   <string name="version_cur">v13cur</string>
+   <string name="version_old">v13old</string>
+</resources>