Use SOONG_STUB_VENDOR_LIBRARIES for vendor linker.config.pb

STUB_LIBRARIES lists all stub libraries including "system" libraries.
There can be a library that provides "stub" only for "system" variant
while its vendor variant doesn't. (e.g. libz). In such cases, using
STUB_LIBRARIES will result a wrong "provide" list in
vendor/etc/linker.config.pb.

So, instead, use SOONG_STUB_VENDOR_LIBRARIES which only lists stub
libraries that are installed in /vendor.

Bug: 313806237
Test: m & cvd start
Test: $OUT/vendor/etc/linker.config.pb doesn't list libz.so
Change-Id: If0f2089594bda5f799fd495f80a27493553cb4e1
diff --git a/core/Makefile b/core/Makefile
index 845f7c8..08f6ebe 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -3781,7 +3781,7 @@
   ALL_DEFAULT_INSTALLED_MODULES += $(_vendor_dlkm_lib_modules_symlink)
 endif
 
-# Install vendor/etc/linker.config.pb with PRODUCT_VENDOR_LINKER_CONFIG_FRAGMENTS and STUB_LIBRARIES
+# Install vendor/etc/linker.config.pb with PRODUCT_VENDOR_LINKER_CONFIG_FRAGMENTS and SOONG_STUB_VENDOR_LIBRARIES
 vendor_linker_config_file := $(TARGET_OUT_VENDOR)/etc/linker.config.pb
 $(vendor_linker_config_file): private_linker_config_fragments := $(PRODUCT_VENDOR_LINKER_CONFIG_FRAGMENTS)
 $(vendor_linker_config_file): $(INTERNAL_VENDORIMAGE_FILES) $(PRODUCT_VENDOR_LINKER_CONFIG_FRAGMENTS) | $(HOST_OUT_EXECUTABLES)/conv_linker_config
@@ -3792,7 +3792,7 @@
 		--source $(call normalize-path-list,$(private_linker_config_fragments)) \
 		--output $@
 	$(HOST_OUT_EXECUTABLES)/conv_linker_config systemprovide --source $@ \
-		--output $@ --value "$(STUB_LIBRARIES)" --system "$(TARGET_OUT_VENDOR)"
+		--output $@ --value "$(SOONG_STUB_VENDOR_LIBRARIES)" --system "$(TARGET_OUT_VENDOR)"
 $(call define declare-0p-target,$(vendor_linker_config_file),)
 INTERNAL_VENDORIMAGE_FILES += $(vendor_linker_config_file)
 ALL_DEFAULT_INSTALLED_MODULES += $(vendor_linker_config_file)