Merge "partition_tools: extend lpunpack for split partitions" am: d9481184ff am: 01806dea85

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/2505925

Change-Id: Ic25a196a99edd6d1b4f6852d30f9b1797c8226d3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>