slf4j doesn't depend on the framework.

Set LOCAL_NO_STANDARD_LIBRARIES to true.

Change-Id: I2eb6207bfbcc34bc13872eeb8c6f7b15988ece1d
diff --git a/Android.mk b/Android.mk
index 577c91a..c5a2611 100644
--- a/Android.mk
+++ b/Android.mk
@@ -24,6 +24,8 @@
 LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE := slf4j-jdk14
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+LOCAL_JAVA_LIBRARIES := core-oj core-libart
+LOCAL_NO_STANDARD_LIBRARIES := true
 include $(BUILD_STATIC_JAVA_LIBRARY)
 
 include $(CLEAR_VARS)