Fix up missed refactoring in JNI reg and preloaded-classes

Change-Id: I079bdf4edfb9083eba3e15d8e4dbf3b2bad9190c
diff --git a/core/jni/android_backup_FileBackupHelperBase.cpp b/core/jni/android_backup_FileBackupHelperBase.cpp
index 8225a36..0137a06 100644
--- a/core/jni/android_backup_FileBackupHelperBase.cpp
+++ b/core/jni/android_backup_FileBackupHelperBase.cpp
@@ -129,7 +129,7 @@
     LOG_FATAL_IF(s_descriptorField == NULL,
             "Unable to find descriptor field in java.io.FileDescriptor");
     
-    return AndroidRuntime::registerNativeMethods(env, "android/backup/FileBackupHelperBase",
+    return AndroidRuntime::registerNativeMethods(env, "android/app/backup/FileBackupHelperBase",
             g_methods, NELEM(g_methods));
 }