Adds merge config files for aosp_redfin_vf.

Includes a small merge.sh that calls merge_target_files with the
necessary flags. This allows updating arguments in a presubmit-guarded
manner, rather than in the branch definition file.

Bug: 170683837
Test: device/google/redfin/vf/merge.sh out/dist
      to merge aosp_redfin_vf from S with aosp_redfin from R.
      Boot device.
Change-Id: I8cefeabd7bce678c170b119983fd0b3d54e45390

vf/framework_item_list.txt

@@ -0,0 +1,22 @@
+IMAGES/product.img
+IMAGES/product.map
+IMAGES/system_ext.img
+IMAGES/system_ext.map
+IMAGES/system.img
+IMAGES/system.map
+IMAGES/system_other.img
+IMAGES/userdata.img
+META/apexkeys.txt
+META/apkcerts.txt
+META/filesystem_config.txt
+META/postinstall_config.txt
+META/product_filesystem_config.txt
+META/root_filesystem_config.txt
+META/system_ext_filesystem_config.txt
+META/system_other_filesystem_config.txt
+META/update_engine_config.txt
+PRODUCT/*
+ROOT/*
+SYSTEM/*
+SYSTEM_EXT/*
+SYSTEM_OTHER/*

vf/framework_misc_info_keys.txt

@@ -0,0 +1,22 @@
+ab_update
+avb_product_add_hashtree_footer_args
+avb_product_hashtree_enable
+avb_system_add_hashtree_footer_args
+avb_system_ext_add_hashtree_footer_args
+avb_system_ext_hashtree_enable
+avb_system_hashtree_enable
+avb_system_other_add_hashtree_footer_args
+avb_system_other_hashtree_enable
+avb_vbmeta_system
+avb_vbmeta_system_algorithm
+avb_vbmeta_system_args
+avb_vbmeta_system_key_path
+avb_vbmeta_system_rollback_index_location
+building_product_image
+building_system_ext_image
+building_system_image
+building_system_other_image
+default_system_dev_certificate
+product_fs_type
+root_dir
+system_ext_fs_type

vf/merge.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+# Thin wrapper around merge_target_files to allow flag changes to be made in a
+# presubmit-guarded change.
+
+readonly DIST_DIR=$1
+readonly VENDOR_DIR=$2
+
+if [[ -z "${DIST_DIR}" ]]; then
+  echo "error: dist dir argument not set"
+  exit 1
+fi
+if [[ -z "${VENDOR_DIR}" ]]; then
+  echo "error: vendor dir argument not set"
+  exit 1
+fi
+
+out/host/linux-x86/bin/merge_target_files \
+  --framework-target-files ${DIST_DIR}/aosp_redfin_vf-target_files*.zip \
+  --vendor-target-files ${VENDOR_DIR}/aosp_redfin-target_files-*.zip \
+  --framework-item-list device/google/redfin/vf/framework_item_list.txt \
+  --framework-misc-info-keys device/google/redfin/vf/framework_misc_info_keys.txt \
+  --vendor-item-list device/google/redfin/vf/vendor_item_list.txt \
+  --allow-duplicate-apkapex-keys \
+  --output-target-files ${DIST_DIR}/aosp_redfin_vf_merged-target_files.zip \
+  --output-img  ${DIST_DIR}/aosp_redfin_vf_merged-img.zip \
+  --output-ota  ${DIST_DIR}/aosp_redfin_vf_merged-ota.zip

vf/vendor_item_list.txt

@@ -0,0 +1,21 @@
+BOOT/*
+DATA/*
+IMAGES/boot.img
+IMAGES/dtbo.img
+IMAGES/vendor_boot.img
+IMAGES/vendor.img
+IMAGES/vendor.map
+META/boot_filesystem_config.txt
+META/care_map.pb
+META/kernel_configs.txt
+META/kernel_version.txt
+META/otakeys.txt
+META/releasetools.py
+META/vendor_boot_filesystem_config.txt
+META/vendor_filesystem_config.txt
+ODM/*
+OTA/android-info.txt
+PREBUILT_IMAGES/*
+RADIO/*
+VENDOR/*
+VENDOR_BOOT/*