LayoutLib: Use the new ninepatch API to suppor density.

LayoutLib now compiles against a prebuilt of ninepatch.

Change-Id: I0a1ca60af90933c171ab3aa456b47f0329df2f55
diff --git a/tools/layoutlib/bridge/Android.mk b/tools/layoutlib/bridge/Android.mk
index b7a602a..9b7bc5f9 100644
--- a/tools/layoutlib/bridge/Android.mk
+++ b/tools/layoutlib/bridge/Android.mk
@@ -21,7 +21,7 @@
 LOCAL_JAVA_LIBRARIES := \
 	kxml2-2.3.0 \
 	layoutlib_api-prebuilt \
-	ninepatch
+	ninepatch-prebuilt
 
 LOCAL_STATIC_JAVA_LIBRARIES := temp_layoutlib