Revert "Revert "ART: Generalize FindClassInPathClassLoader""

Bug: 32510706

Change is not responsible for the flakiness after all.

This reverts commit af3572bc21cf66f970090c852b976095bb028083.

Change-Id: I399049c217deeac6a5c3f9d678a46bdb84386e3f
diff --git a/runtime/well_known_classes.h b/runtime/well_known_classes.h
index d07977a..227996a 100644
--- a/runtime/well_known_classes.h
+++ b/runtime/well_known_classes.h
@@ -48,6 +48,7 @@
   static jclass dalvik_annotation_optimization_CriticalNative;
   static jclass dalvik_annotation_optimization_FastNative;
   static jclass dalvik_system_BaseDexClassLoader;
+  static jclass dalvik_system_DexClassLoader;
   static jclass dalvik_system_DexFile;
   static jclass dalvik_system_DexPathList;
   static jclass dalvik_system_DexPathList__Element;