Export INTERNAL_KERNEL_CMDLINE to Soong

Test: CI
Bug: 379945468
Change-Id: Ic516036a88bde6bbe906d4cd8e31b3b22c332008
diff --git a/core/soong_config.mk b/core/soong_config.mk
index 081aa20..4683476 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -445,6 +445,7 @@
   $(call add_json_str, InitBootSecurityPatch, $(INIT_BOOT_SECURITY_PATCH))
   $(call add_json_str, VendorSecurityPatch, $(VENDOR_SECURITY_PATCH))
   $(call add_json_bool, BoardIncludeDtbInBootimg, $(BOARD_INCLUDE_DTB_IN_BOOTIMG))
+  $(call add_json_list, InternalKernelCmdline, $(INTERNAL_KERNEL_CMDLINE))
 
   # Avb (android verified boot) stuff
   $(call add_json_bool, BoardAvbEnable, $(filter true,$(BOARD_AVB_ENABLE)))