PLATFORM_PREVIEW_SDK_VERSION = 2 for DP2

Bug: 27150977
Change-Id: I8b86b5565dbdf81dffb4bc9ba0eef8a3c3f91d20
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index e72c841..3ae78c2 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -82,7 +82,7 @@
     # 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 := 1
+    PLATFORM_PREVIEW_SDK_VERSION := 2
   endif
 endif