Final SDK, set PLATFORM_PREVIEW_SDK_VERSION to 0

Change-Id: Ic5af01a7017d2ac5b73d677689d15e4a8ad5dc14
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 25dfcdc..efb2bee 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -80,7 +80,7 @@
     # assuming the device can only support APIs as of the previous official
     # public release.
     # This value will always be 0 for release builds.
-    PLATFORM_PREVIEW_SDK_VERSION := 4
+    PLATFORM_PREVIEW_SDK_VERSION := 0
   endif
 endif