Update input to DexSplitterTests.splitFilesObfuscation

Change-Id: I3c7d54e70fc48698f3219ad36df3e8f78f353852

src/test/examplesAndroidN/dexsplitsample/Class3.java

diff --git a/src/test/examplesAndroidN/dexsplitsample/Class3.java b/src/test/examplesAndroidN/dexsplitsample/Class3.java
index 98469a5..7dba306 100644
--- a/src/test/examplesAndroidN/dexsplitsample/Class3.java
+++ b/src/test/examplesAndroidN/dexsplitsample/Class3.java
@@ -5,6 +5,9 @@
 package dexsplitsample;
 
 public class Class3 extends Class1 {
+  // Instantiate Class1 to prevent it from being merged into Class3.
+  private static final Class1 obj = new Class1();
+
   public static void main(String[] args) {
     Class3 clazz = new Class3();
     if (clazz.getClass1String() != "Class1String") {