- runs during install/update when an old format file is detected and upgrades it to the current default format which now properly separates Build fields and system properties
- supports all previously used deprecated entries, e.g. BUILD_ID, FIRST_API_LEVEL and VNDK_VERSION
- extracts any missing information for default added fields from the FINGERPRINT
- may also be run manually from command prompt with `sh migrate.sh` or with file explorer app supporting scripts like FX File Explorer