Rebuild and copy recovery patch files when using vendor_otatools

  Rebuild recovery and copy recovery patch/install files when building vendor images using vendor otatools. Fixes ota_from_target_files failure.

Bug: 220126689
Bug: 186097910

Test: sign_target_files_apks \
        --vendor_otatools=otatools_vendor_dir \
	--vendor_partitions=vendor,odm \
	merged-target_files.zip \
	signed-target_files.zip

Change-Id: I4a415417e0d7b1bcd548292ec8f3a12570ec65f0