* Lineage introduced a new version of the addon.d system (used to
  preserve the privext during OS updates) for the A/B partioning
  scheme, support that.

More details:
* https://lineageos.org/Changelog-19/#addond-v2
* https://github.com/LineageOS/android_vendor_lineage/commit/524fe03bfbdd29946129365cd63733a8e9e8df2e