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.

(cherry picked from commit 89b94c827f92e107b286ab60876ff9f75ba22a33)

Change-Id: I025c0adc70535bf23def3ab0ce28a1bfaef72514
diff --git a/core/droiddoc.mk b/core/droiddoc.mk
index 1421761..f791884 100644
--- a/core/droiddoc.mk
+++ b/core/droiddoc.mk
@@ -73,8 +73,8 @@
     $(full_target): PRIVATE_BOOTCLASSPATH := $(call java-lib-files, sdk_v$(LOCAL_SDK_VERSION))
   endif
 else
-  LOCAL_JAVA_LIBRARIES := core-libart ext framework $(LOCAL_JAVA_LIBRARIES)
-  $(full_target): PRIVATE_BOOTCLASSPATH := $(call java-lib-files, core-libart)
+  LOCAL_JAVA_LIBRARIES := core-oj core-libart ext framework $(LOCAL_JAVA_LIBRARIES)
+  $(full_target): PRIVATE_BOOTCLASSPATH := $(call java-lib-files, core-oj):$(call java-lib-files, core-libart)
 endif  # LOCAL_SDK_VERSION
 LOCAL_JAVA_LIBRARIES := $(sort $(LOCAL_JAVA_LIBRARIES))