Prevent implicit outputs created during dexpreopt_config.zip

$PRODUCT_OUT/dexpreopt_config.zip is created by zipping all the
dexpreopt configs of individual apps. These config files are created in
$PRODUCT_OUT/dexpreopt_config, and this dir is as used as -C for
soong_zip.

In the current implementation, this build action also implicitly copies
global configuration files dexpreopt.config and dexpreopt_soong.config
into $PRODUCT_OUT/dexpreopt_config with the intent of being included in
the resultant zip file. These implicit outputs are unknown to ninja.

This CL prevents creation of these implicit outputs.
out/soong/dexpreopt_soong.config and
out/soong/dexpreopt_<arch>/dexpreopt.config is now passed directly to
soong_zip via -f.

Bug: 333316620
Test: m out/target/product/vsoc_x86_64/dexpreopt_config.zip # no longer
bit identical since the relative order changes, dexpreopt(_soong).config
now appears at the bottom of the zip
Test: zipcmp dexpreopt_config.zip.before dexpreopt_config.zip.after # no
diffs

Change-Id: Ib30c9a5c436e263231f9688129ab94664277b841
diff --git a/CleanSpec.mk b/CleanSpec.mk
index f8c96ff..f562279 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -787,6 +787,10 @@
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/)
 $(call add-clean-step, find $(OUT_DIR) -type f -name "*.jar" -print0 | xargs -0 rm -f)
 
+# Remove obsolete dexpreopt_config artifacts
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/dexpreopt_config/dexpreopt.config)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/dexpreopt_config/dexpreopt_soong.config)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************