Dump a copy of metadata file for full OTA

When building the full OTA file, write a copy of the metadata to the
dist dir. Then it will show up in the artifact of the build page for
users to parse.

Bug: 124783265
Test: make dist and check the output metadata
Change-Id: I2eb06bbf3cbb9f3653ca3352f3d601b09403d59d

core/Makefile

@@ -4069,6 +4069,8 @@ name := $(name)-ota-$(FILE_NAME_TAG)
 
 INTERNAL_OTA_PACKAGE_TARGET := $(PRODUCT_OUT)/$(name).zip
 
+INTERNAL_OTA_METADATA := $(PRODUCT_OUT)/ota_metadata
+
 $(INTERNAL_OTA_PACKAGE_TARGET): KEY_CERT_PAIR := $(DEFAULT_KEY_CERT_PAIR)
 
 ifeq ($(AB_OTA_UPDATER),true)
@@ -4077,10 +4079,12 @@ else
 $(INTERNAL_OTA_PACKAGE_TARGET): $(BROTLI)
 endif
 
+$(INTERNAL_OTA_PACKAGE_TARGET): .KATI_IMPLICIT_OUTPUTS := $(INTERNAL_OTA_METADATA)
+
 $(INTERNAL_OTA_PACKAGE_TARGET): $(BUILT_TARGET_FILES_PACKAGE) \
 	    build/make/tools/releasetools/ota_from_target_files
 	@echo "Package OTA: $@"
-	$(call build-ota-package-target,$@,-k $(KEY_CERT_PAIR))
+	$(call build-ota-package-target,$@,-k $(KEY_CERT_PAIR) --output_metadata_path $(INTERNAL_OTA_METADATA))
 
 .PHONY: otapackage
 otapackage: $(INTERNAL_OTA_PACKAGE_TARGET)

core/main.mk

@@ -1454,6 +1454,7 @@ else # TARGET_BUILD_APPS
   $(call dist-for-goals, droidcore, \
     $(INTERNAL_UPDATE_PACKAGE_TARGET) \
     $(INTERNAL_OTA_PACKAGE_TARGET) \
+    $(INTERNAL_OTA_METADATA) \
     $(INTERNAL_OTA_RETROFIT_DYNAMIC_PARTITIONS_PACKAGE_TARGET) \
     $(BUILT_OTATOOLS_PACKAGE) \
     $(SYMBOLS_ZIP) \