Bump PREVIEW_SDK_INT for Q builds.

We've already added new APIs in Q, so we shouldn't be claiming a
value of "0", which signals a production platform release.

Bug: 120797950
Test: manual
Change-Id: I6c9063ac4ace79b3ee6b1c67ccdf76f4063ad165
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 42a3bea..c76537b 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -179,8 +179,11 @@
     # SDK version the package was built for, otherwise it should fall back to
     # 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 := 0
+    # This value will always be forced to 0 for release builds by the logic
+    # in the "ifeq" block above, so the value below will be used on any
+    # non-release builds, and it should always be at least 1, to indicate that
+    # APIs may have changed since the claimed PLATFORM_SDK_VERSION.
+    PLATFORM_PREVIEW_SDK_VERSION := 1
   endif
 endif
 .KATI_READONLY := PLATFORM_PREVIEW_SDK_VERSION