Export some board config vars to Soong

These will become properties on the autogenerated android_device module,
and will be used to create misc_info.txt

Test: presubmits
Bug: 398036609
Change-Id: I3ff1c1976754041b763811d4212508f1eddb5153
diff --git a/core/soong_config.mk b/core/soong_config.mk
index f5c5238..b774648 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -570,6 +570,10 @@
 
   $(call add_json_str, ReleaseToolsExtensionDir, $(firstword $(TARGET_RELEASETOOLS_EXTENSIONS) $($(TARGET_DEVICE_DIR)/../common)))
 
+  $(call add_json_list, BoardPartialOtaUpdatePartitionsList, $(BOARD_PARTIAL_OTA_UPDATE_PARTITIONS_LIST))
+  $(call add_json_str, BoardFlashBlockSize, $(BOARD_FLASH_BLOCK_SIZE))
+  $(call add_json_bool, BootloaderInUpdatePackage, $(BOARD_BOOTLOADER_IN_UPDATE_PACKAGE))
+
   # Fastboot
   $(call add_json_str, BoardFastbootInfoFile, $(TARGET_BOARD_FASTBOOT_INFO_FILE))