Adding EXTRA_ALLOWED_DEPS_TXT config for non-mainline deps

Ignore-AOSP-First: changes chain includes sdv related changes
Test: Ran APEX soong tests and manual test
Bug: 333868045
Change-Id: Ifd3baa7b7a14947200a614256191fe1741875427
diff --git a/core/project_definitions.mk b/core/project_definitions.mk
index 5728b67..184b03e 100644
--- a/core/project_definitions.mk
+++ b/core/project_definitions.mk
@@ -22,3 +22,6 @@
 # Include definitions for prebuilt SDK, if present.
 #
 -include prebuilts/sdk/current/definitions.mk
+
+# SDV-specific config.
+-include system/software_defined_vehicle/platform/config.mk