Bump the base sdk extension version in TM

T will ship with extension version 2 (probably 3, actually, but
definitely not 1), so bump the base extension version.

Bug: 222049920
Test: m nothing
Change-Id: I9a718a514e64c2fa6795a3512af6528e177ede17
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index fb8333a..7cd00e9 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -82,7 +82,7 @@
 .KATI_READONLY := PLATFORM_SDK_EXTENSION_VERSION
 
 # This is the sdk extension version that PLATFORM_SDK_VERSION ships with.
-PLATFORM_BASE_SDK_EXTENSION_VERSION := 1
+PLATFORM_BASE_SDK_EXTENSION_VERSION := 2
 .KATI_READONLY := PLATFORM_BASE_SDK_EXTENSION_VERSION
 
 # This is are all known codenames starting from Q.