Switch from core to core-libart

Bug: 14298175

(cherry picked from commit dbcae5ceb766b0bc65fa819841f9bfab9ae11c2f)

Change-Id: I982d02184b7bfdd14f447e2761fe5d058c53489b
diff --git a/Android.mk b/Android.mk
index 273f5f6..52c2d16 100644
--- a/Android.mk
+++ b/Android.mk
@@ -630,7 +630,7 @@
     -since $(SRC_API_DIR)/18.txt 18 \
     -since $(SRC_API_DIR)/19.txt 19 \
     -since $(SRC_API_DIR)/20.txt 20 \
-		-werror -hide 113 \
+		-werror -hide 111 -hide 113 \
 		-overview $(LOCAL_PATH)/core/java/overview.html
 
 framework_docs_LOCAL_API_CHECK_ADDITIONAL_JAVA_DIR:= \