Use user variant for vintf finalization

Bug: 389524798
Test: see the child change
Change-Id: I5d4575c19681218460d8a721beadadc8034507f9
diff --git a/tools/finalize-vintf-resources.sh b/tools/finalize-vintf-resources.sh
index aa67b94..11de637 100755
--- a/tools/finalize-vintf-resources.sh
+++ b/tools/finalize-vintf-resources.sh
@@ -130,7 +130,7 @@
 # Build general_sepolicy.conf, plat_sepolicy.cil, and mapping file for CTS
 DIST_DIR=out/dist $top/build/soong/soong_ui.bash --make-mode dist sepolicy_finalize bpmodify
 
-cp "$top/out/dist/plat_sepolicy.cil" "$prebuilt_dir/${ver}_plat_sepolicy.cil"
+cp "$top/out/dist/base_plat_sepolicy.cil" "$prebuilt_dir/${ver}_plat_sepolicy.cil"
 cp "$top/out/dist/general_sepolicy.conf" "$prebuilt_dir/${ver}_general_sepolicy.conf"
 cp "$top/out/dist/$ver.cil" "$prebuilt_dir/${ver}_mapping.cil"