Use core-oj alongside core-libart wherever required.

With some core classes moved to separate core-oj jar
we need to use the new jar.

Change-Id: Ie069c7a93e63b1df854b3137d984b96520562609
diff --git a/core/config.mk b/core/config.mk
index 53f1fc0..e1131f8 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -667,7 +667,7 @@
 
 # allow overriding default Java libraries on a per-target basis
 ifeq ($(TARGET_DEFAULT_JAVA_LIBRARIES),)
-  TARGET_DEFAULT_JAVA_LIBRARIES := core-libart core-junit ext framework okhttp
+  TARGET_DEFAULT_JAVA_LIBRARIES := core-oj core-libart core-junit ext framework okhttp
 endif
 
 # Flags for DEX2OAT